From Conservapedia's front page:
Conservapedia is a much-needed alternative to Wikipedia, which is increasingly anti-Christian and anti-American. On Wikipedia, many of the dates are provided in the anti-Christian "C.E." instead of "A.D.", which Conservapedia uses. Christianity receives no credit for the great advances and discoveries it inspired, such as those of the Renaissance. Read a list of many Examples of Bias in Wikipedia
Because not saying, "In the year of our Lord" (Anno Domini) is anti-Christian. Oh those poor, persecuted Christians. By that logic, not using Jewish years makes them antisemitic. It's 5767, you Nazis!
I wouldn't be surprised if wikipedia does have a slight liberal/libertarian bias, depending on the topic, but Conservapedia is just hilarious. They also don't have much content as of yet.
Some of the comments at Dispatches put Conservapedia into context:
This sounds like it could grow into a viable strategy for extremists who want to keep their followers isolated from reality: simply create their own "reality," with its own encyclopedias and other authoritative-looking backups, so people won't have to -- or think they have to -- look outside their own bubble-verse for any answer to any question that might pop up in their minds.
This is just what these folks have been doing for a long time. One of my friend's from church (from when I was a teen) was homeschooled. His dad said, on more than one occasion, that the reason a woman should go to college, is to make her qualified to teach her children at home.
All of their text books came, either from a Christian publishing house, or off the list of approved texts from the same publisher (sorry, I don't recall the name of the publisher). They also had a set of encyclopidia's from the same publisher.