To see the full AUE FAQ at Mark Israel's Web site, click here . There are other newsgroups that also discuss the English language. There is a mailing list for copy-editors. Newbies post many things there that would better be posted here. There are also long lists of such things in the rec.puzzles archive.
Language features peculiar to the U.K. get discussed in soc.culture.british as well as here.
It features a different selection from the Jargon File each day. It allows you to type in an item and search directly for its definition.