Holey Moley, this is big!  It’s monstrous big, check out this article at Microsoft Research:

http://research.microsoft.com/en-us/news/features/mobisys2011-062811.aspx

Totally cool and easy to read article.  You can bet that I am going to be blogging the heck out this technology.

You might want to read the paper at:

http://research.microsoft.com/en-us/people/sagarwal/mobisys2011.pdf

In fact, the paper is easy to read, so if you are a student who is hanging around the house over the summer, and your parents are bugging you to do stuff, read this article, write up a little report and present it to them.  Then play some xbox games.