As you can read on the SharePoint Team Blog, SharePoint 2010 has reached RTM status.
There is word about availability on MSDN.
Our Volume License customers with active Software Assurance (SA) on these products will be one of the first to receive the 2010 set of products. They will be able to download the product in English, French, Spanish, German, Russian, and Dutch via the Volume Licensing Service Center starting April 27. Other languages will be available on a rolling timeline. Customers without SA will be able to purchase the new products through Volume Licensing from Microsoft partners starting May 1.
The launch will still be on May 12th. –> http://www.the2010event.com/