"Is WikiIslam written by Christians?" appears to be a popular incoming search term, so I thought the question deserved an answer.
To be clear, WikiIslam welcomes all potential editors, regardless of their personal beliefs. The webmaster/website owner is an atheist (no, it's not me), but if you adhere to the site's policies and guidelines, then your religious beliefs, or lack thereof, are irrelevant.
WikiIslam is meant as a resource for all critics, therefore it focuses strictly on Islam. You will generally not find articles there discussing Muslim immigration, multiculturalism, leftists-rightists, the Israeli-Palestinian conflict or President Obama, because these issues are of a political rather than religious nature.
Likewise, you will not find any articles there promoting or criticizing other religious beliefs or ideologies such as Christianity, Hinduism, Judaism and so on. However, it does accept the theory of Evolution as a scientific fact and aims for a rational approach in its handling of Islam.
Back to the original question; "is WikiIslam written by Christians?" To those who are not well versed in debating Islam with Muslims and their apologists, this may seem like a strange question. The reason why it is asked is quite simple; they want to know which fallacious tu quque arguments to use against you. On some occasions they'll even flatly refuse to discuss Islam with you unless you "disclose" your world view.
Muslims and their apologists rarely care about free thought or discussing the Islamic texts and their theological implications. They want to stifle discussions on Islam by derailing them onto other beliefs. Some of them are so desperate that they'll ignore the fact that you're atheist and continue calling you a Christian, or falsely accuse you of using Christians and Jews as sources.
Regardless, for those who are interested, this is probably not the answer you were looking for, but here it is anyway:
Small sample of articles written by atheists (both male and female, WikiIslam is not Shari'ah compliant)
http://wikiislam.net/wiki/Aisha_Age_of_Consummation
http://wikiislam.net/wiki/Refutation_to_Muslim_Apologetics_against_Aisha's_Age_of_Consummation
http://wikiislam.net/wiki/Creation_of_Humans_from_Clay
http://wikiislam.net/wiki/Allah_the_Best_Deceiver
http://wikiislam.net/wiki/Flat_Earth_and_the_Qur'an
http://wikiislam.net/wiki/Earth_Made_of_Seven_Layers
http://wikiislam.net/wiki/Embryology_in_the_Qur'an
http://wikiislam.net/wiki/Allah:_I_sent_Jibreel_to_blow_into_Mary's_Vagina
http://wikiislam.net/wiki/Allahu_Akbar
http://wikiislam.net/wiki/Corruption_of_Previous_Scriptures_(Qur'an_2:79)
http://wikiislam.net/wiki/Islam_and_Bestiality
http://wikiislam.net/wiki/Qur'an_and_Semen_Production_(Qur'an_86:7)
http://wikiislam.net/wiki/Qur'an_and_the_Descent_of_Iron_Miracle
http://wikiislam.net/wiki/Qur'an_and_the_Lying_Prefrontal_Cerebrum
http://wikiislam.net/wiki/Qur'an_Describes_Gender_Determination_By_Sperm
http://wikiislam.net/wiki/Dealing_Justly_with_Wives_and_Orphans_(Qur'an_4:3)
http://wikiislam.net/wiki/Islamic_Prophecies
http://wikiislam.net/wiki/Qur'an_Only_Islam_-_Why_it_is_Not_Possible
http://wikiislam.net/wiki/Michael_Jackson_(Conversion_to_Islam)
http://wikiislam.net/wiki/Qur'an_Predicted_Black_Holes_And_Pulsars
http://wikiislam.net/wiki/Qur'an_Predicted_Land_Decreasing
http://wikiislam.net/wiki/Setting_the_Record_Straight:_The_Non-Miracle_of_Islamic_Science
http://wikiislam.net/wiki/Purpose_of_the_Mahr
http://wikiislam.net/wiki/Qur'an_and_Milk
http://wikiislam.net/wiki/Revelation_of_the_Hijab
http://wikiislam.net/wiki/Sahih
http://wikiislam.net/wiki/The_Root_of_Terrorism_a_la_Islamic_style
http://wikiislam.net/wiki/The_Miracle_of_19
http://wikiislam.net/wiki/Unjust_Treatment_of_Wives_(Qur'an_4:129)
http://wikiislam.net/wiki/Women_are_Deficient_in_Intelligence
http://wikiislam.net/wiki/The_Qur'an_and_Mountains
http://wikiislam.net/wiki/Was_Muhammad_a_Lesser_Prophet_than_Moses_or_Jesus%3F
http://wikiislam.net/wiki/Witnessing_the_Moon_Splitting_Miracle
http://wikiislam.net/wiki/Google_Earth_proves_Islam
http://wikiislam.net/wiki/Standing_Mosques
http://wikiislam.net/wiki/Muhammad's_Miracles
http://wikiislam.net/wiki/Animals_Marked_by_Allah
http://wikiislam.net/wiki/Moon_Split_Images
http://wikiislam.net/wiki/Word_Count_Miracles_in_the_Qur'an
http://wikiislam.net/wiki/Cousin_Marriage_in_Islam
http://wikiislam.net/wiki/The_Ramadan_Pole_Paradox
http://wikiislam.net/wiki/Islam,_Science_and_the_Problems_at_Wikipedia
http://wikiislam.net/wiki/Scientific_Errors_in_the_Qur'an
http://wikiislam.net/wiki/Speed_of_Light_in_the_Qur'an
http://wikiislam.net/wiki/Adverse_Effects_of_Islamic_Fasting
http://wikiislam.net/wiki/Contradictions_in_the_Qur'an
http://wikiislam.net/wiki/Misconceptions_about_Jihad
http://wikiislam.net/wiki/Jihad_is_Compulsory_(Fard)
http://wikiislam.net/wiki/Converts_to_Islam
http://wikiislam.net/wiki/List_of_Killings_Ordered_or_Supported_by_Muhammad
http://wikiislam.net/wiki/Why_Terrorism_is_Allowed_in_Islam
http://wikiislam.net/wiki/Revelational_Circumstances_of_the_Qur'an
http://wikiislam.net/wiki/Baby_with_Qur'anic_Verses
http://wikiislam.net/wiki/Answers_to_Objections_When_Discussing_Islam
Small sample of articles written by agnostics
http://wikiislam.net/wiki/Contradictions_in_Qur'anic_Christology
http://wikiislam.net/wiki/A_Brief_Analysis_of_Muhammad’s_Farewell_Sermon
http://wikiislam.net/wiki/Aisha_and_Puberty
http://wikiislam.net/wiki/Sex_Segregation_in_Islam
http://wikiislam.net/wiki/The_Genocide_of_Banu_Qurayza
http://wikiislam.net/wiki/The_Meaning_of_Consummate
http://wikiislam.net/wiki/The_Story_of_Umm_Qirfa
http://wikiislam.net/wiki/The_Tragedy_of_Aisha
http://wikiislam.net/wiki/The_Ultimate_Message_of_the_Qur'an
Small sample of articles written by deists
http://wikiislam.net/wiki/A_Qur’anic_Understanding_of_the_Universe
http://wikiislam.net/wiki/Embryology_in_Islamic_Scripture
http://wikiislam.net/wiki/Free_Will_and_Predestination_in_Islam
http://wikiislam.net/wiki/Islam_and_Science
http://wikiislam.net/wiki/Qur'an_and_the_Big_Bang
http://wikiislam.net/wiki/The_Qur'an_Leads_the_Way_to_Science
In short; the vast majority of contributers to WikiIslam are either atheists or agnostics. But this bit of information is of no real importance because the validity of facts and truth itself does not depend on the personal beliefs of those who speak it.
