For a limited time (first 100,000 downloads) you can obtain an updated Pre-RC1 build of the Vista beta (5536). Over beta 2 this has a decent performance increase, and a few nice touches in the MCE UI as well such as greater use of the thumbnail facility in My TV. This will also be available via MSDN . If by the time you read this the download limit has been reached, don’t worry RC1 should be coming in the near future.

Public Download: http://download.windowsvista.com/preview/prerc1/en/download.html