Google Groups has added some new functionality that enables us to distinguish between discussion, question, and announcement posts. If you use the (new) web interface to make a post (https://groups.google.com/forum/?fromgroups#!forum/web2py), it will now default to a "question" post. However, you can easily change that to "discussion" or "announcement" once you are creating the post. It is also now possible to add a comma separated list of tags to each post. Enjoy.
Anthony