The talks I have listened to so far:
The first was GeoVector, which is billed as a way to find out what objects are in "real space". Reminded me of the book "Rainbow's End"...
"The Human Race" is another talk going on. This is hilarious... its a turing test with a college sense of humor. You compete to be the first to talk to a live caller!
Botanicall is what you think... give whiney plants the ability to complain directly to you about their needs.
Nice little Xterm like device from a company called Ndiyo.
Phil Zimmermann spoke on his Zfone project.
I love listening to these sorts of talks, they generate ideas :)
...perhaps there is a future for "Talk to a Geek".