So I've downloaded and installed the RC of VS2010 Ultimate edition. I've been running Beta2 previously, and mostly everything has been working just fine. There was an occasional problem with resharper and VS's stability, but that was fine; besides, it was much better that VS2008 anyway, so..
But now I got build1612 of Resharper, and things went downhill - badly. And build 1613 only made it worse!
I open Resharper->Options, then close them - VS crashes. Or, if it doesnt crash, then the next click inside the code (anywhere) crashes it. Code hilighting still does not work - it semi-worked (some were hilighted, such as strings, others werent, such as namespaces). For some reason, some of the icons in 1613 are missing in the Options dialog - but I assume that is a temporary problem that will be solved quickly. I wouldn't even mention it VS wouldn't crash after closing Resharper Options. Hmm, what else....Ah! It crashes somewhat randomly - VS, that is, not resharper. I would assume it is due to a resharper bug (though I still have to check that).
I think that's about it for now. If any details are needed, I'll be glad to contribute, since having Resharper by my side when developing is a real god-send, so if I can help improve it, I will.