Have you tried the app Refresh? It's iOS only right now, though Android is coming. It is now one of the apps I use most, right up there with Foursquare and TripIt, and more than some like Instagram.
The gist is that you sync up a bunch of accounts (Facebook, Foursquare, Gmail, Meetup, Evernote, AngelList, etc) and your calendar, and then whenever you're meeting someone, you can find out a ton of interesting intel about what they're up to and your mutual connections and interests. I confessed to LinkedIn's head of marketing last week that now when I go to meet someone, I use Refresh instead of LinkedIn's app because Refresh has so much more info.
I'm not an advisor, investor, paid shill, or secret employee - just a raving fan. And I was so open to raving that I did an interview with them for Refresh's blog, something I rarely do for someone's promotional efforts, but it is a great product and one I can endorse it wholeheartedly.
The only glitch I've had is that I can't sync Outlook to it, though that may be an issue with my Outlook rather than Refresh, as I can't sync Outlook to LinkedIn's contact manager either. Beyond that, Refresh is a homerun, and it keeps getting better.