I wonder what the server and bandwidth specs would need to be to host your own system.

And would companies be happy with their employees collaborating with other companies employees, even if they're a trusted partner, if the data has to go through the Google server? There was some mention during the Federation part of the video about private replies and them not going to the Google servers, but I'm not sure whether that was just because the private replies were between two people on the same private Wave system.

The thing is, Office 2010's big feature is the collaborative working, where the desktop software, the Windows Mobile apps and the new web-based versions of Word, Excel and so on can all be connected "live" to documents in Sharepoint and everybody can edit them at the same time. Which sounds a lot like Wave, except that Wave is "open", although I'm unclear as to whether that means it's a standard that Google are going to hand over to ISO or ECMA or W3C or not.

The one that will be of the most interest to me is the one that I can easily integrate into my own applications, allowing multiple users to simultaneously modify any LOB data, rather than just documents and spreadsheets.

Also, Google are getting pretty evil lately. It'd be hard not to, when you're in control of the world's information flow.