Back in the day, and well ok I admit it this is still on my bulletin board in the office, Tim Dutcher put together a Microsoft Dynamics CRM v4.0 Quick Reference Sheet. This was a GREAT resource for all things new and new back in October 2008 was Dynamics CRM v4.0!
Now before you roll your eyes you might want to take a peek. A similar reference page can be put together for all things Dynamics CRM 2011. It just needs to be done and to get started here is the model!
if you have yet to move to Dynamics CRM 2011 and you have people ramping up on Dynamics CRM v4.0 they might like it
if you want to follow my style and always know what features came out with which version so you can know the version number of the features (see this lets you know if the feature is robust or maybe just a bit wet behind the years)