Just in case you missed it... Office announced at PDC that Office 14 will enable people to to create, edit, and collaborate on Excel, Word, PowerPoint, and OneNote documents in the browser. Here are some links with more information:

Microsoft to Extend Office to the Browser 
Q&A: Microsoft Senior Vice President Chris Capossela discusses how extending Office applications to the browser will increase choice and flexibility for customers.

Here is a New York Times article on the topic.

Here is a channel 9 interview with Antoine Leblond and a preview.

We aren't talking yet about Access 14, so please be patient.