3.1 is coming along well so far. I put some more work into tabs last night and got a lot of improvements in; it's shaping up quite nicely. I don't know if they will ship with 3.1 by default, but it will be available via the hidden preference if not. I got some performance improvements out of the calendar as well. I don't think any more large features will be in 3.1 (due to time constraints), however I would like to do some more under-the-hood work. To that end I am strongly considering raising the minimum OS to 10.2.7 to allow for use of WebKit (Safari's underlying engine). This would improve some of the networking functionality, especially for LiveJournal. It could also open up some interesting possibilities for HTML exporting. I don't think it will be a problem for most users, but let me know of any strong objections. I will be dropping 10.2.x entirely eventually, but I don't know how and when yet.
There have been new alphas the past few weekends but I think I might skip this weekend to do the WebKit changes. So far all the changes I have are to the tabs so I want to get something else in there in case you don't like tabs. ☺ Maybe sometime next week, although I do have jury duty....