There's a web-based version. Dunno if it's any good but it can't hurt to try:
http://www.microsoft.com/typography/cleartype/tuner/step1.aspx
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microsoft just released Office 365, which is fully web-based.
BTW, IBM Lotus just freely released Symphony 3.0, which is built on OpenOffice 3. I haven't had a chance to play with it yet.
