Would hub.darcs.net suffice, as it has a bug-tracker, etc. there as
well (even if it doesn't have as pretty a UI as github)?
Seems a bit unlikely, but if Duncan isn't willing to give up darcs, we could try it - provided the repo could be administered by multiple people. There's a good number of solid people already managing github.com/haskell, so we have a reasonable chance of bugs being triaged and patches accepted in finite time. The existing management structure there helps to tip the scale a bit.