Well the real nice part would be PG himself using git and doing diffs against other repos to see what's festering in the community.
Right now the forum seems to be the only what of contributing patches to arc and this seems ripe for having things lost. (And who wants to bring up the same patch twice if it went unnoticed the first time).
Well, taking arcn.tar and merging it isn't that hard - I did it for arc1 and will probably continue to do so. It would just be nice if we could have more granular official patches.