How many times you've checked the MSDN Library online for obtaining informations (not always so simple...) and you've thinked if it will be possible to save the retrieved pages (maybe as a CHM file)? Now you can do this... 
A new little project borned on CodePlex is Package This, a GUI tool written in C# for creating help files (.chm and .hxs) from the content obtained from the MSDN Library via the MSDN Content Service. You select the content you want from the table of contents, build a help file, and use the content offline.
The tools is on its first stage but it sounds really promising...