Here’s Cory answering a question from the audience about file formats and longevity:
“I think that, in general, promiscuity is a better longevity strategy than longevity itself. I think having one copy that’s armor-plated is a less effective strategy for having your work last than having a bizillion copies.” — Cory Doctorow.

Audio – Cory Q and A (Lo-res 3 MB)
Cory Q and A – ALL (Hi-res 74 MB)
Cory Q and A – ALL (Lo-res 32 MB)
Cory Q and A – Part 1 of 2 (Lo-res 18 MB)
Cory Q and A – Part 2 of 2 (Lo-res 14 MB)