http://www.luckycal.com
This past July, we got lucky (ha!) and won a grant from Facebook as part of their fbFund program (http://www.facebook.com/press/releases.php?p=4821).
Here's the rub: in order to capture most of those funds, we need to have a large and active user population in Facebook. That's fine, except that my team isn't talented at competing in the attention economy that Facebook apps typically populate. Instead, we built something we'd want to use: useful, polite and non-annoying.
At the risk of pleading, I'd very much appreciate if you'd give that app a try, especially within Facebook:
http://apps.facebook.com/luckycal
Help keep a fellow entrepreneur out of the cubicles: invite your friends.