In a short mail exchange with Kevin Mark, he coined the term "contribute.debian.net" (or .org). I really like this name, and the idea behind it:

Similar to packages.qa.debian.org/packagename, we create a platform trying to encourage people to contribute to Debian.

Stuff that should be listed here includes:

• Pending and missing translations
• Missing metadata (Homepage, Screenshots, support groups, alternatives, Debtags, ...)
• Open bug reports that 'need help' or are unhandled
• ...

Other views include the canonical translation views (DDTP/DDTSS) or the current TODO page (which is not very widely known, I think, and probably not updated very often either) and such tools, of course. Again, similar to packages.qa.debian.org, but with a focus on non-DD-contributors.