Sort of off topic - but cool new phone technology - I think our RFID system will be the world wide standard in a few years - this article might help give an idea of technology in the near future - if we have any cool ideas with potential technology I think we should propose its future adaptation to our system - even if its not currently available
http://bits.blogs.nytimes.com/2009/11/06/adding-a-sixth-sense-to-your-cellphone/?hp