Web 2.0: Lightweight Business Models, Part 2: "Next up in the Lightweight Business Models workshop, a talk by Marc Canter..."—Abe Fettig's Weblog

Note: This one counts as a triple, since it's about a conference called "Web 2.0", the conference costs $2,400 to attend, and the seminar mentioned is being presented by Marc Canter, of DigiScents ("a smell-based platform") fame. (I'm not making this up!)