Filtering within categories has been on my todo list. I'll reprioritize.

Right now there are over 500 non-meetup.com groups on the site (and if that seems low, keep in mind that curation is a key value proposition I'm providing). That said, I have several hundred more staged that I need to do a little more cleaning up on before I push to the production site.

Also, if you missed it, check out the RSS and Twitter feeds. Seeing all of the upcoming events in one place, without having to join all of the groups (and be subject to inbox deluge) is pretty nifty.

Thanks for the feedback... and the morale boost.