MSBuild Sidekick documentation is available!
When we released version 2.1 of the Sidekick, the original post failed to mention one pretty significant feature available in version 2.1. The new installer includes not only the application itself but also the manual (in PDF format) to help you leverage MSBuild Sidekick functionality.
The document contains description of UI elements, large number of helpful how-to hints and walkthroughs with application usage. It is accessible upon installation of the application through Start->MSBuild Sidekick menu (or just locate it in the application folder in Program Files).
We have received several requests for better documentation while in fact the documentation was there! So hopefully that post will help some users out there.