All our code is up on GitHub where you can keep up with the latest developments and the platform roadmap. To file a bug or a feature request, simply create a new GitHub issue at tag it appropriately. You can use one or more of the following tags:
The folks at GitHub have done a fantastic job so you will get notified each time there's a comment on your issue or if it gets referenced in a commit. How cool is that?!!
We also have a mailing list where developers, deployers and the curious get to interact - swiftriver(at)googlegroups(dot)com...and there's also @swiftriver on Twitter.