in reply to
ACM Programming Competition
...I meant to join this year, but scheduling conflicts don't allow for it...
I'm assuming you're talking about your local chapter at school - for the most part, being a member of ACM doesn't require any time. If you go to http://www.acm.org, you'll find the organzation's homepage. If you're looking for membership information, check here - you'll find a link for a student membership, if that's what you're interested in. Professional membership is pretty steep, but as long as you're a student, the membership fee is actually quite minimal.
With your membership, you're not required to attend any meetings, but you'll be a card-carrying member of ACM. With that, you'll automatically get the ACM publication Communications and also the student publication Crossroads (along with a handful of other perks). Both are pretty good. If you want more information, check out their site.
Skepticism is the source of knowledge as much as knowledge is the source of skepticism.