A colleague just pointed me to a wiki at SAP (http://wiki.sdn.sap.com/wiki/display/ABAPConn/ABAP+Connectivity+Home) where they announce a new version of the SAP .NET Connector. It will support current Windows releases (Windows XP 32 Bit, Windows 2003 32/64 Bit (x64), Windows Vista 32/64 Bit (x64), Windows 2008 64 Bit (x64) and later Windows 7) as well as up-to-date Microsoft .NET Runtime versions (2.0, 3.0 and 3.5).
Public availability is planned for December 2010. Starting immediately customers can apply for participation in a beta program. Shipment of the first beta versions is planned for July 2010. If you are interested, please check out the details on the Connectors SMP Hompage, SAP .NET Connector section, and fill out the beta program application form.