the expression team has made another drop of their blend tool. the september preview of 'blend 2' is available on the site. i installed it yesterday and it has some nice improvements for both client and silverlight development. some better control over keyspline animations if you need them, more properties exposed on things you would have liked not to edit xaml on :-), etc.
have fun and get it! you have to uninstall the august preview if you have it. blend 1 (rtm) and blend 2 preview can run side-by-side (that's how i run them) fyi.