Yesterday I installed Parallels 4 and Windows 7 on my MacBook. Main reason was to get more out of Sharepoint. YNNO, the company I work for, is using Sharepoint 2007 for more than a year now. Since I am using a mac some features are not fully available (only IE is fully supported). Some other company sites are not fully available on the Mac.
So I finally made up my mind, I would use parallels and windows. Of course Windows 7 RC1 was my Windows version of choice.