Google Code now lets developers track the latest updates on projects: 1) added user update streams to make it easy to see what a particular user has been doing across Project hosting on Google Code by looking at the activities on his profile page. 2) You can now starred a project or developers to get the updates by looking at your personalized updates. Starred projects are also added to the new "My projects" drop-down, which makes it easy to navigate to a project from anywhere on the site.

Finally, the following feeds are available Updates for a user,  Developers a user is tracking, Projects a user is tracking