Some good Longhonr Notes over at Gritstone & Chips. Basically some things that were broken then fixed are back again, and others that were never fixed still aren't. However, as from what I've seen the Longhorn UI is nothing like what it'll be in 2+ years when it's released, and is just a hacked version of the Windows XP UI (except for some of the new tray, window border and the new ugly space wasting crap on top of all the explorer windows of course). Anyone whose seen it will know what I mean.
Check out this review of a demo of a pre-release version of Windows, from BYTE magazine: http://toastytech.com/guis/win1983.html
Other reviews/timelines at: http://toastytech.com/guis/index.html
Where can I download the Longhorn UI from?