A colleague of mine recently pointed me to this great article on the scalability of office productivity suites on terminal services. The tests reviewed OpenOffice 2.1, Microsoft Office 2003, and Microsoft Office 2007.
The testers also put the 32-bit and 64-bit versions of Windows to the test to see if there was any difference. You can view the study in its entirety or you can just skip ahead to the results.
The bottom line of the tests show that you will get the highest number of active sessions with Microsoft Office 2003. Suprisingly Microsoft Office 2007 isn’t all that far behind. I ususally hear rumblings of how Microsoft Office 2007 is a memory hog but this test seems to debunk that myth.