Maybe it's just me but hitting F1 in Revit 2011 to access Help via the internet is a real pain.
(and whatever happened to context sensitive Help... one of the few advantages of an application running on Windows OS? )
Anyway, there is a simple way to enable the local installed Help document:
http://usa.autodesk.com/adsk/servlet...linkID=9243099
although the values described are already listed in the revit.ini file in RAC2011
[Documentation]
UseHelpServer=0
HelpBrowser=0
Setting 'UseHelpServer=0' does the trick.
I know I may be missing out on Help file updates but it should be possible to download those rather than constantly have to access the Autodesk website.