I'm currently considering a big "no no" and jumping over to VS 2010 while it's still in RC... after all, text code is text code, how bad can it "F" things up?
I'm just wondering if anyone is using VS 2010 for their projects? I'm very much interested in the subtle additions as well as the multi-screen support.
As you said first of all it is still in RC. People wouldn't upgrade the current Visual Studio version unless there is a reason for it.
If you are not going to use any of the features in .net 4.0, it is probably not important to switch to Visual Studio 2010.
I've been using it in a VM and it's been pretty stable and even resharper 5.0 has support for it now so it's as good as fully baked for my liking.
A few things to be careful of are:
the .sln files aren't backwards compatible so it won't be easy to share with other people not using VS2010.
There are a number of plugins that don't yet support VS2010 so if you depend on any third party plugins make sure they work
ASP.NET MVC 2 RC 2 has a bit of funkiness so you should check out this post to make sure you've got all your stars aligned if you're using 2010 and MVC.
We are using VS2010RC and TFS2010 for our projects in production. Works great!!
What I like in VS2010 and use:
What I like in VS2010 but don't use yet:
Yes, Multi Monitor support works a bit better, but was fine for me with VS2008 too