Could stackoverflow.com work for other fields?
brandnewlow: Are you famous in your field?  No?  Then it won't work.HN works because PG is here. Reddit worked because PG was there to help it start.Digg works because Kevin Rose is there.StackOverflow works because Joel and Jeff are there.Unless you've got a large audience to toss at the project on day one, expect a long, hard slog.