I just checked out the forum. Looks like there's quite a few issues with 100% CPU usage, corrupted system files, uninstalls that don't complete leaving busted systems etc..
Think I'll wait for a later build that has some of these issues fixed before trying it. Maybe when it's actually 2010 Returnil 2010 will have most of this stuff ironed out.
Looks like they went right from RC1 to product with no fixes between the two.