The two first samples that I have created about Team Explorer extensibility are about getting the information contained in the Builds and Pending Changes pages.
The Builds page contains three sections: My Builds, Favorite Builds Definitions and All Build Definitions:
To get that information from a package you need to use the Microsoft.TeamFoundation.Build.Controls.Extensibility.IBuildsPageExt interface. See the following article:
The Pending Changes page contains the Comment, Related Work Items, Included Changes and Excluded Changes sections:
To get that information from a package you need to use the Microsoft.TeamFoundation.VersionControl.Controls.Extensibility.IPendingChangesEx interface. See the following article: