document updated 15 years ago, on May 24, 2009
30boxes
I use 30boxes.com as a way to track the specific meetups that I usually want to go to (meetup.com forces you to join groups to find out much information, which spams its internal list quite a bit)
To change the list of meetups I'm subscribed to on 30boxes, see the list of .cal URls at Settings > Web Stuff.
The groups I'm subscribed to include ("big" = on the list of largest meetups):