If the BDFL and everyone else who have merging rights are missing for an unknown amount of time, I suggest you use DrPi’s repository either until they get back or until you decide to fork the project. The longer you wait, the messier its gonna be to get back on track.
I’m just a (somewhat inexperienced) MyHDL user who’d hate to see this project die, so I thought I’d add my opinions to the discussion.
It would be such a shame if the project dies just because two people become inactive, especially when there clearly is a community willing to submit pull requests and take the project forward.
IMHO, 7 months of no communication at all is a very long time. Had I been in your position, I think it would be a good time to consider making a fork.
I’m not trying to whip you guys into working more by the way. Just adding my two cents in the form of some opinions.