I have a few problems regarding using ActionBarSherlock example and mono for android.
Monodevelop does not recognize the ’Com’ namespace. I can compile without errors but the IDE does not recognize the namespaces and classes inside it.

Anybody else suffering from this issues?
Are you referencing the DLL, or the Java Binding project? There is a known bug for this: https://bugzilla.xamarin.com/show_bug.cgi?id=6695. It looks like this bug has been fixed, just not released yet.
If you reference the DLL instead of the binding project you should get your Intellisense back.