We are happy to announce that we just launched project update streams (and feeds) for each open source project on Google Code. The new project updates page, which is linked to from each project homepage, shows the updates that are occurring in the project.
One of the benefits of open source software development is that you can watch how the software is built. Take a look at the updates of some popular open source projects:
These updates are also available as feeds. Here are the feeds for the urls above: