The current feed for "New modules" is http://drupal.org/taxonomy/term/14/0/feed (linked from What RSS feeds are available?). Since several long months, this feed includes all new sandbox modules, which defeats its purpose and is hard to follow because it is very busy. Can we have the feed of proper new modules back, and perhaps a separate feed with just sanboxes.
In order to provide maximum information flexibility to developers and users, most pages containing lists should have RSS feeds available.
Particularly Tracker and friends, as well as e.g. module landing page revisions, so that you can receive notifcations about module updates that aren't actual releases, but still may be relevant.
Stuff like that.