My Google profile has contact information, including a way to send me a message if you don't know my email address.
My PGP key has id 0x43B03158.
Me on some other sites: FriendFeed, Twitter, Live Journal, getsatisfaction.com, stackoverflow, Launchpad, Mountain Project, Knol, foursquare, thecrag.com, goodreads.com, Yelp, Google Books, Slashdot.