I am definitely not an expert on Windows 7. I have been using the beta and it is working well for me. I noticed this post from a several weeks ago about the upgrade thinking.
On a related note, I have been using more and more ClickOnce apps. It is really great when app deployment just works. I think we all appreciate that.
All of this got me thinking about Silverlight. As I have posted before, we are actively developing much of our new UI in Silverlight. With MIX09 just around the corner there are a lot of good resources popping up on Silverlight. Check out the Robert Hess interview of Brad Abrams on Silverligth 3.0