You can reach the pkgme developers through a few different means.
The developers team on Launchpad hosts a mailing list which can be used to contact the developers. You can subscribe to the list by joining the team and opting to subscribe to the mailing list. You must be a member of the team to post to the list.
The developers hang out on the #pkgme channel on irc.freenode.net.
You can report bugs on Launchpad.