I'm loving 43 Things. It's a web site that lets you record what you'd like to do (goals, dreams, resolutions) and then connects the people who share those to-dos. So you could potentially help each other achieve something, or if you've already done something that someone else wants to do, you can give them advice on it.
They originally launced Twinkler as an earlier version of it, and it still shows the basic concept. The new one still requires an invite, but you can sign up to check it out (I can also invite you if you're interested). It's fascinating to see the kinds of things that people would like to do.