A bit too late, but just for the sake of completeness: I'm Douglas Drumond, the guy that helps Björn Winckler build MacVim on other versions of OS X.
Depending on when (in the day) a new snapshot is released, it can take a few hours for me to get home, build it for 10.7 and 10.8, and send to Björn who then must read my e-mail and upload it to code.google.com. Previously, when github allowed downloads of arbitrary files, I uploaded on my own account and Björn linked to it, so the last step wasn't necessary.