TECH RANT: I wanted to write an iPhone app to interface with my car - control various functions and provide analytics. However, my car's OS doesn't have and API. How absurd is it that in 2009 car manufactures would create closed off gardens and not allow people to build apps for their cars. :)
FitBit - wireless sync with a Mac/PC. Basically tracks your movement 24/7 (including your sleep). http://www.fitbit.com/ . As the iPhone announcement today showed, I think body monitoring tools that keep track of your body vitals and movement (and the social networks that develop as a result) are going to be huge.