Maybe it is silly I know, but I think it is awesome that Microsoft packaged a copy of Windows 7 as a commemorative edition to thank the Beta Testers.
Here is a scan of what the box looks like below:
I thought this was cool.
Brad
Read the complete post at http://owsug.ca/blogs/brad/archive/2009/11/07/Received-my-Commemorative-Edition-of-Windows-7-with-Thanks-from-Steve-Palmer.aspx