Well... I thought it was about time that we got all of these /commands documented a bit better, so building on insom's work, I've made a preliminary webpage.
I've basically started to test all the commands, and separating them into sections according to their use.
I would like comments and suggestions, as well as any help you might be able to offer. So if you have information on any of the ones I have not yet tested, feel free to post your info, and I'll be sure to update the page.
http://www.koderi.dk/eq2commands.htm
Be advised that the page looks like crap, it's an auto-generated Html page, based of Excel, but it'll do for now. In time, I might turn it into a database instead. But for now, the main thing is getting the last 600+ commands tested and verified.