Has anyone used the new Peeple Online Office Suite? It's similar to MS Office and oOo, but with a twist: the applications reside on the Peeple website; no expensive proprietary software to purchase and no upgrades to worry about. All of your documents can be safely stored on your own hard drive.
Apparently it is a work in progress (Beta), containing a spreadsheet application, calculator, word processor application and desktop window that allows you to open multiple applications in the same window. It hopes to employ off-line capability and Peeple WebMaps in the near future.
Potential Drawbacks: compatible with Open Office (oOo) but not MS Office applications; documents stored online limited to 2Mb.
Collaboration seems a bit different, too. They are partnering with Touchstone, a desktop notifier program, that will alert you if someone on your project team edits or contributes a document. Not exactly like office IM, but probably an improvement.
Might be interesting to test-drive.