We hear you!
I know ... we said we were unsure about when (or even if) we would support Classic on Visual Studio 2010. You all shouted "we want it and we want it soon."
The Object Mapper works in VS 2010 today (v.184.108.40.206). The plug-in designers for Binding Managers do not work in VS 2010 today ... but I'm told that we just got them working internally and we expect to include them in our next Classic release ... coming soon.
We are working quickly to ensure that everything you do for your Classic apps today in VS 2008 will have a reasonable analog in VS 2010 ... and that includes the designer support.
I don't have a release date for you right now. The best I can say is "soon".
Hope you find this bulletin comforting. Stay tuned!