The VSTO team blog has moved to http://blogs.msdn.com/vsto , and the RSS feed is http://blogs.msdn.com/vsto/rss.xml. The team blog is an interesting source of insider information on VSTO, I'd encourage you to subscribe.

Some cool recent posts over there:

Developing an add-in for multiple versions of Office (Mary Lee)

Share a Ribbon Customization between Office Applications (Norm Estabrook)

New Power Tools - Ribbon IDs Tool Window (Kemp Brown)

Aggregating blogs in a blog (Mary Lee)

Deploying Departmental Solutions via Email (Christin Boyd)