Since VS2010 Beta 2 is now out, I wanted to uninstall VS2010 Beta 1 to get ready. When I attempted to remove Beta 1 I received the following error "Setup is looking for file TFSObjectModel-x86". The installation would then stop and roll back.
I went back to Add/Remove programs and eventually noticed the application installed as Microsoft Team Foundation Server 2010 Beta 1 Object Model – ENU. Once I removed this, I was able to uninstall Beta 1.
Hope that helps
DotNetDoc - Daniel Egan