0.5.0.0 has already had a release candidate, which means that no new pull requests will be accepted for 0.5.0.0 except fixes for bugs in the release candidate. So it’ll have to wait for the next release after that, which hopefully won’t be as long as the wait for 0.5.0.0!
I haven’t seen one, but you can check https://github.com/diaspora/diaspora/pulls (just go back as far as the end date of this proposal).