Nothing has changed in the skins department since the last beta. Skins are still looking to take the fall for vista users. Now that its a public beta it means that this is now very likely to happen.
For those that don't know what I am talking about I did a post on Design Evovled that addresses the new beta in this respect.
http://www.designevolved.net/board/showthread.php?tid=328
Unless some workaround is figured out (asides from disabling Aero system wide) its not looking good. I am going to hold off some of my advanced skins for a while until I know where this is all going, there wouldn't be much point in starting something complicated if its just going to end at 8.5.