Russell, over at Infoworld reports:
According to published reports, Office 11 (due next year) won't support Windows 95, 98, or ME. The earliest supported version, per the reports, will be Windows 2000. This means that a substantial number of organizations with pre-W2K systems will have to undergo a serious upgrade path or risk becoming incompatible with new versions of Office.
And later in the article...
By switching to OpenOffice.org, you regain control over your hardware and software upgrade cycle. You also regain control over your IT budget. If you want corporate support, check out OpenOffice.org's elder brother, Sun's StarOffice.
Food for thought.