Seems like I missed most of the fun here, but I'm definitly a fan of more visibly linking user groups to php.net (I think I got us listed as an event once, but since it wouldn't pull from Meetup, I just didn't get around to it again).
Integration with meetup would be a big plus (happy to help there, as I have a few hacks that mangle Trello / Meetup / etc for our local general tech group). Joind.in sounds good too, although I've only put one or two meetups there. For some reason the approval / admin process just feels like it's for conferences, and I feel silly doing it for our monthly meetup (just a perception issue probably). Seems like there are some potential features that could be added there to make that process easier for recurring meetups (just a thought, no criticism intended). Love Beth's idea of a speaker database. As two of us do most of the presentations, it would be great to find speakers who are near (or traveling near) our area, as well as those comfortable doing it remotely. Tim