Frankly, there is a TON of info present, and as someone who hasn't yet attended an on-site DEFCon (though I hope to someday), it's a bit overwhelming.

I certainly understand the appeal of a plain text format, but personally, I think it would be a big improvement to have a schedule grid (think TV guide or similar) with the village on one axis and the time slot on the other.

I think this would make skimming over the schedule a lot easier overall, as well as making it easier to focus on a particular village or time slot, while still being able to relate/compare it to the others. I also think this is especially helpful since the talks vary in size and can overlap with each other, so having a visual representation would IMO make it a lot easier to see at-a-glance what the conflicts are.

Of course, this could just be my personal preference, as this is what is used by several of other conferences I have attended or do regularly attend. I'm certainly no UI expert.