I have an iMac 27 with Parallels 7. Running both Windows 7 and Windows XP with this system, in Widows 7, I can run a CMS (Contact Management System) embedded in Internet Explorer 9 (32 bit) with ActiveX-Components enabled for a full collaborative environment. In Windows XP at the same time I have Yahoo Messenger (11.5) running. I could not run the CMS with IE9 (64 bit), but fine with 32 bit. I had some problems with Yahoo Messenger and Windows 7, IE9, but it is just great with Windows XP and IE7. Multiple Windows systems with the Mac in coherence mode is very powerful tool for live internet collaboration.