Where is the Sourceforge for Web 2.0 Apps?

Tim O'Reilly has written a post suggesting a source code version control web service for Google Gears applications.

While reading the post, I was reminded of my what I've been asking myself lately when I started porting one of my open source projects from the Desktop platform to the Web.

You see, for desktop apps, SourceForge provides open source projects with download services so that users can download and then install your application. But web applications don't need downloading, rather, support for various server-side scripting languages, server side database access, monitoring tools and bandwidth. The requirements are different.

For the non-commercials users, the "Sourceforge for Web2.0" can run mandatory ads on every application and impose bandwidth restrictions. You can then allow developers to run their own ads and provide them with monitoring tools so they see for themselves when it's time to go "pro". That should be workable, right?

So far, I haven't heard of any service like this. It looks like Amazon is the only well-known company doing something similar with their web services division where they are providing storage and CPU services. But as far as I know, that's only paid for services that don't include hosting various types of databases and scripting languages, or does it?

'cause that would be super cool!