I just released version 1.1 of the meetup_events module for Drupal. I started building this about 6 months ago when we started using Meetup for Mid Hudson Astronomical Association to draw in new members.
I hate data entry. I find entering the same data twice into a computer one of the most soul sucking things I could do. So having both events on our website, and on meetup, meant I needed to automate things.
Meetup events was thus born. The model is simple, your Drupal site is considered the authoritative resource. You select which node types (which have date fields) you want to sync to meetup, and whenever you create or update an event of that type a meetup entry is made (or updated) accordingly. The body content that is synced is tokenized (and I added a few tokens for getting nodereference content). Venues are a little hokey right now, but I just provide a selector for a numeric field either on the main type or on a nodereference which maps to it.
Once you set up the module, including your API key and group url, you pretty much forget it is there. Then you just edit as per normal. Any time you save a type that you are syncing you'll notice this:
Which includes a link to the meetup event that was just saved.
One of the more recent things I worked on was integration with views so that there is now a Meetup Events: Meetup Link view field for nodes. If you add that to a node listing (and you've registered for an oauth key) you'll get the meetup dynamic RSVP button for your event.
There is plenty of work remaining here, ways this could be nicer, but I'm pretty pleased with the results so far. It's made me learn a bunch about Drupal's ctools module, more than I ever wanted to know about the drupal settings system, and how to pull in incompatible versions of jquery in custom tools.
I've also been really happy with my experience with the Meetup team. They've added multiple API calls for me to make my life easier. Thanks guys. If every developer facing team acted like that, the world would be a much better place.
The meetup platform is turning out to be a really great way for our Astronomy club to draw in new people, and I've started using it for MHVLUG now as well. Now that I've got meetup_events, I can do that seamlessly without data duplication, or degrading our native experience. If you are interested in doing the same, check out the module. Bugs and patches welcomed.