Microsoft says that Visual Studio packages are binary compatible from 2005 so any packages that loaded successfully into VS 2005 should work in VS 2008. Err, no. At least not with VS 2008 beta 2. I admit it didn't take much of a change to fix things, but it wasn't seamless.
So, I just committed a patch to our trunk repository that enables Connector/Net in VS 2008 beta 2. Here's a shot of it running.
This trunk repository will eventually be our 5.2 release and you can grab a sneak peek by pulling a snapshot from here.