Thought this was an interesting concept by two guys from NYTimes Lab.  Its a simple web application that allows you to collect notes, feeds, snippets, etc and sync them between your computer and your mobile phone.   In order to sync the data they attached an RFID chip to a phone so that when you place your phone down it knows to sync with your computer.  Watch the demo to really understand how it works.

http://www.techcrunch.com/2007/06/26/shifd-a-clever-mobile-app-from-the-ny-times/