The Data Dude, a.k.a. Gert Drapers, Architect and Development Manager for Visual Studio Team System Database Edition, has a pair of posts on his blog discussing the recent announcement that VSTS Database Edition is merged into VSTS Development Edition, effective 1 October 2008. Two SKUs are now one. Here are the Dude's posts.
The posts include links to the announcement and an FAQ page, as well as some good discussion.
I consider this to be excellent news! Thanks to the VSTS team for making this change!