Kyle told me about this stuff and it seems so unbelievably cool.

http://graphics.stanford.edu/papers/lfcamera/

Like Kyle says, "probably the coolest invention in photography since film".

Also, http://scpv.csail.mit.edu/levoy.htm

The video they have linked on their website is worth watching after you have had a look at the web page.  This stuff is on youtube as well, linking it in here (though the quality of the direct avi file is arguably better):

I wonder how long it will be till we have this in cameras that we can afford to buy - 15 years?