Anyone can change it. Just click the edit button. If you register you may have more chance to have changes kept.
An AE Wiki would be pretty sweet, as it would be way easier to convince someone to read a pithy wiki than Socialism, or Ethics of Liberty, etc.. Being more of a philosophy of freedom guy myself, rather than an economics wonk, it would be great to see some of that side of liberty based thought there as well.
Working on it, piece by piece.
With Wikipedia, one always needs to remember that AE is a hard sell, independent of editorial bias (which is unfortunately present). I wouldn’t call the school ‘fringe’, but it is definitely not mainstream. Plus they are frequently annoyed by our less diplomatic supporters, who indiscriminately edit anything they come to, culminating in edit wars. The image of the average Austrian supporter is not very bright it seems.
Do small edits, link well, hold on to your references. It’s very possible to start on obscure historical pages and slowly go to more important topics.
I’ve inserted and have been editing a section on the Wikipedia page for praxeology on the etymology of the word over the past few days. I found the word being used several times earlier than Louis Bourdeau and Alfred Espinas, who are usually credited with coining the term; one instance was 260 years before Bourdeau by Clemens Timpler. There are several books on praxeology and the origin of it out there, but all of them have missed this.
The rest of the praxeology Wiki needs cleaning up, but I’ve really only worked on the etymology section.
Wikipedia is a stupid idea. A mass of people edit-warring over one monolithic gospel text. I don’t think so.
There is a StackExchange site for questions and answers about Austrian Economics running at:
http://mises.stackexchange.com/
Please do take a look at it, its much faster and dynamic than wiki, and much more direct in terms of what you are looking for than a forum.It has not even touched 24 hours since the first question appeared on it and it has already 21 questions and many fold answers on it.
Its awesome
Did you write the stuff about “Praxeology (from πραζιζ, action), or by referring to the influence of the environment, environmental data (from μεơοζ, middle)”? Did the person you’re quoting really write ζ in place of ξ and ς? 
Yeah. I’ll need to look at the book again, but I’m pretty sure I copied it exactly as it was written; I wanted to make sure I had it perfect. What should it really be?
πραξις and μεσος (or, more properly, πρᾶξις and μέσος)
I mostly prefer to make small edits or add to relatively obscure pages, like the Bank of Amsterdam. There is one major topic, though, which I would like to take on at some point - the Panic of 1907, used to justify the Fed. There has been already an Austrian-leaning explanation present in the summary of the topic, but it was thrown out. That wasn’t surprising.
What is needed is some skillful writing, that would find a good place for the explanation, and not draw the immediate ire of Wikipedians (maybe a separate section on the causes, or adding a small section somewhere). No less important are the resources, (I don’t have more than Rothbard’s writings at hand - some points are here and here), so some research may be necessary.
If anyone is interested and willing to do the work, please let me know. I have little time, but will help you, should you accept this mission.