To log a bug, go to
https://connect.microsoft.com/VisualStudio and click on "New Bug." Once you fill in and submit the bug form, the bug will be investigated and may be escalated to a product team to fix. Every bug is looked at by someone at Microsoft, and I'd strongly encourage you to report any issues you find.
It doesn't sound like this applies in your case, but it may be useful for others with the same question. If you report a crashing bug, please attach a crash dump if you have one, as this is very helpful to the developers who will investigate.
Thanks for trying out the Visual Studio 2010 CTP!
Brittany Behrens
Program Manager, Visual Studio Platform