...is none of your business. At least that's the answer I got a while back - I'm not currently at liberty to tell you much about what I've been doing. With any luck, as Longhorn gets closer to shipping, we will reach a point when I'll be able to tell you a bit more.
To tell the truth, for the last 4 or 5 weeks I've mostly been fixing bugs. Some of them are problems with my code, some of them are changes in the way controls appear and/or are laid out, some are due to changes/enhancements coming in Longhorn, and others are due to some recalcitrant code that I use (not Win32, though that is also recalcitrant).
I'm in at work today to get a checkin done (Whidbey beta1 expired Friday, and I had to reinstall), and to get my laptop updated (Whidbey Beta1 expired...)