We also selected five or six talks per track, and the submitters of those will also be contacted. The rest of the talks get selected by Mar 1. I couldn't select just five from Perl--I think I ended up selecting seven. The selections are to populate the brochure with content, and picking only five representative excellent talks was impossible.
It's so weird how each year's conference has a different personality. How I word the CFP or who I beg for talks doesn't seem to affect the final results--it'll be what it'll be, and this year it's gonna rock. I found a beautiful mix of "what you'll need to know now" and "what you'll need to know tomorrow". Thanks to everyone who submitted talks.
As usual, my biggest problem is space. I could darn near fill all of OSCON with Perl tutorials and talks if I wanted to. We've moving the "State of the Onion/Union/..." talks (the topic-specific keynotes by Guido, Larry, Rasmus, etc.) to all be evening events, so we should buy more space in the other tracks that way.