I like the status quo, and I don't want Mudcat so complicated that it goes down. I get withdrawal syndrome.
The only change I'd like is for the logic to be a bit furrier when I search for a thread or song.
If anyone wants a spellchecker, there is one on some browsers (Opera's is a bit simple, though)and the free download of Wordweb sits on the toolbar and is pretty complete, with both English and American spelling. It's a dictionary rather than a spellchecker.