It's official May 12th, 2010, is the launch date for SharePoint 2010 & Office 2010.
In addition, Microsoft announced the intent to RTM (Release to Manufacturing) this April 2010.
This is great news, you can virtually join the launch event in May 12th at 11am EST to listen to Stephen Elop, President of the Microsoft Business Division, announce the launch.
You can register for the event @ http://sharepoint.microsoft.com/businessproductivity/proof/pages/2010-launch-events.aspx.