That is correct! I did come across reading somewhere that 10.1 would include 2010 express comparability as well.
I think it will be VS 2010 only with 10.1.
Unless something has since changed, the 10.0 and 10.1 Deprecation document stated:
"ArcGIS 10.0 is the last release that the ArcObjects SDK for Microsoft .NET will support Visual Studio 2008."
"ArcGIS 10.1 ArcObjects SDK for Microsoft .NET will no longer support Visual Studio 2008. Esri recommends using Visual Studio 2010 for ArcObjects development for ArcGIS 10.1."
Also, if poloboy13 happens to read this -- which solution solved your problem?