The June CTP of VS 2005 includes Team Foundation Server. However, this is not the June CTP discussed in the Team Foundation MSDN forums and elsewhere. That CTP is now scheduled for July (it was the last week of June, so it didn't change much). So, anywhere you've see a reference to the June CTP for TFS in the forums, think July CTP.
The July CTP of TFS will include quite a few performance improvements, protocol changes (which means the just-released June CTP won't communicate properly with the upcoming July CTP of TFS), and nearly all of the code names are gone from assemblies, namespaces, and databases. We are upgrading our dogfood system to use what we are going to release as a July CTP of TFS, so it's getting more time and effort than a normal CTP. The June CTP of VS is just a build from June 1 (50601.01).
So, if you are looking to install the latest Team Foundation Server and see how it has changed since beta 2, wait for the July release.