I run into the Microsoft System Center “Service Desk” timeframe on a wepage

• Beta1: December 2006 (TAP is running)
• Beta 2: end of April 2007
• RC: beginning of July 2007
• RTM: December 2007

There will be a public beta around March 2007 (according to the rumor)  

There are a couple of screenshots at this and this page. You can find more information about “Automating IT Service Management with System Center” here