I just did that today - I tried 2008 for a couple days and got fed up with the browser crashing the whole system. The I.T. Talk site won't come up at all - crashes the browser immediately. Other sites hang the whole tablet. 2008 looks promising, but sure seems like some big bugs have to get cleaned up if they're still going to release this month. Maybe it's just me, seems like others here have had better luck . . .

Flashing back to 2007 and restoring old settings works fine, you will have to re-install any additional apps.