There's a lot of "what's new in VS 2010" going on, but what's really BIG–what is MS pushing, where is the excitement, where are the partners going? Two immediate things stick out.
1. Scrum. Scrum is all over the place. Scrum is baked in to TFS 2010, it has great support (including SharePoint dashboards and Excel planning workbooks), and a bunch of partners have add-ins for managing and reporting on Scrum from TFS. Pluralsight is offering all kinds of Scrum training
2. MVC 2.0. This is part of VS 2010, but also runs in VS 2008 (download from http://asp.net/mvc). Partners are developing components (not controls, more like scaffolds and HTML helpers).