Some of you may have already clicked on the banner at ProZ.com advertising TermWiki. I browsed it today and even added a few words. It has a nice look and feel to it with the possibility of uploading images, which is always a good way to explain terminology.
The lexicon is divided into languages (there are several including English and Spanish) as well as industries (?). I would choose a term more on the order of domain, but perhaps an industry forces TermWiki users to be industrious about adding terminology. Who knows?
At any rate, the legal "industry" is awaiting new terms, and the site is giving away an IPad to the person who uploads the most terms.