So, Microsoft went gold with SQL Server 2008, including the core engine flavor (but no basic management studio) of the Express edition. Horray!
Problem is, Visual Studio 2008's database development project support is built entirely around SQL Server 2005 Express, not SQL Server 2008 Express, and I for one made the mistake of dropping SQL Server 2005 Express to install SQL Server 2008 Express and hoped that there was sufficient compatibility to keep my database projects supported. Not so.
So I had to go back to v2005, but now the problem was that there was NO LINK on Microsoft's web site to get back to SQL Server 2005 Express.
I had to rely on Google to acquire this:
http://www.microsoft.com/downloads/details.aspx?familyid=5B5528B9-13E1-4DB9-A3FC-82116D598C3D&displaylang=en