Many of the talks given at YAPC &c are available online. If you check with authors beforehand they normally don't mind if the talks are recycled (feel free to use any of mine). That would solve a major issue: having time to compose the slides.
-- Steven Lembark 85-09 90th St. Workhorse Computing Woodhaven, NY, 11421 lemb...@wrkhors.com +1 888 359 3508