Want to administer your Windows Server 2008 servers (including Server Core and Hyper-V) without using Terminal Services? Microsoft just released the Remote Server Administration Tools (RSAT) for Windows Vista SP1. The links may or may not work for you... but here you go:
For anyone testing Hyper-V there is a separate download for that role (probably separate since Hyper-V isn't finalized):
Keep in mind these downloads require Vista SP1 in an Active Directory domain environment. If you have trouble with the links just hit www.microsoft.com/downloads - search for RSAT or Hyper-V and sort by date. They should be at the top of the list. Enjoy!