Hosam Kamel on Get up to speed on Visual Studio 2008.
The US ISV Developer Evangelism Team Blog on Hierarchical Work Items in VSTS "Rosario".
Naren on Defining custom actions for state transitions and Adding custom menu items to "Team" menu.
Dominic Hopton on Unit Testing Dependency Properties with VSTT, a first stab.
Buck Hodges on TFS 2008: Controlling the number of threads used in uploading and downloading files.
The Accentient Blog on Microsoft P&P releases Team Development with Team Foundation Server Guide.