We can follow issues on individual project pages, but I'd love to be able to follow project releases/builds. I.e. it would be easier to have a list of projects that I was following rather than having to look through a myriad of project pages that I'm interested in.
Creating a Project at d.o should automatically generate a project-relevant Organic Group,
complete with a link to that organic group from the project page. That way, users could easily join an established sub-community built specifically around a d.o Project directly from its project page.