I've been testing out Smultron, a text editor written in Cocoa for Mac OS X, as an alternative to BB Edit. A week in, and I'm sold! The feature set is comparable to the BareBones Mac standard, and includes some seriously tasty offerings like Split Window to edit 2 docs at once, grouping files into Projects, saving oft-used pieces of code as Snippets, the ability to Preview HTML docs, and .Mac Sync to sync your preferences.
The interface icons pretty much suck (much like the name), but if you can get past those points give this piece of freeware a try. Do it. Now.