Ok, it isn't called Google Office (yet). But, you can see it coming. Google opened up...

docs.google.com

...which combines the (former) Writely web-based word processor with Google's web-based spreadsheet. Microsoft Office and OpenOffice.org are in no danger of being replaced by it yet. But, this web-based combination looks very handy.

All you need to get access is a valid Google Mail (GMail) account.