I'd like to point out that not all software authors want Launchpad or Bugzilla reports in their inbox, though, especially newbie questions or esoteric packaging discussions. Opt-in may or may not be the best policy. Personally I try to alert upstream myself when it appears to be a real bug.

For Fedora or RHEL, you can get an RSS feed from Bugzilla. Do any search (such as Advanced Search with Component "dstat") and then click the "FEED" link at the bottom. Personally I did that search once and then created a Firefox smart search to replace the "component=" string with whatever package I want.

Looks like there aren't any dstat bugs right now, but here are CLOSED dstat bugs, for example.