Longhorn Beta 3 has been released and is available at the link below. This is a major milestone obviously and is essentially feature complete. I'm looking forward to testing some of the key feautures such as Server Core, Read-Only Domain Controller, and especially all the new Terminal Services feaures such as TS Gateway and TS Remote Programs. I've been doing a lot of work and demos with Terminal Server on Beta 2 that customers have been very positive about.

http://www.microsoft.com/windowsserver/longhorn/audsel.mspx