The official date(s) has now been announced on the Office 2010 Engineering Blog:
“In addition to the Office 2010 Technology Guarantee, were excited to confirm that Office 2010, SharePoint 2010, Visio 2010 and Project 2010 are on schedule and will release to manufacturing (RTM) next month.
For businesses, we will launch the 2010 set of products, including Office 2010, SharePoint 2010, Visio 2010, and Project 2010 worldwide on May 12. To find out more about the Worldwide Business Launch, visit http://sharepoint.microsoft.com/businessproductivity/proof/pages/2010-launch-events.aspx.
For consumers, Office 2010 will be available online and on retail shelves this June. Until then, you can get the Office 2010 beta at www.office.com/beta.”
Looks like May the 12th will be a big day this year, time to start getting ready!