http://jott.com uses voice recognition to transcribe your spoken message into an SMS or email. The way they put it, "send SMS with your voice." Great for emailing yourself reminders, too.
http://pinger.com lets you send voicemail to people without calling them. Perfect for late night messages or when you don't really want to talk to the recipient... (Next courtship ritual: breaking up on pinger.) Also great for messaging multiple people at once. Think of it as voice email.
http://grandcentral.com is your personal assistant that screens and routes calls and much, much more. My favorite feature: designating certain callers as SPAM. Future calls from those numbers automatically get a "number not in service" message when they call you. Genius.
I thought this was really cool--a sign of things to come in our society. Crowd-financed movies... (Maybe there's hope for humanity after all.) I look forward to the day when blockbusters are financed with lunch money by kids who vote on what happens to Spidey in the next installment. (There's no hope for humanity.)