We are still discussing plans for subscription services
Salon.com started doing this about a year ago. They charge $35 for a year for the option of no commercials and some premium content. I think it works just fine. Why would anybody object to paying $3 a month (a dime a day) to keep this site going and avoid intrusive ads? Probably a better long-term solution than contracting with a popup vendor and then recommending users to employ an anti-popup device. ;D
On a much lighter note, you might consider the option of allowing product placement in discussion threads. Katy could wax lyrical on the merits of Coke Lite while Tim and Henri have a deep discussion as to the relative merits of the Lincoln Navigator. I’m sure I could post for days on end about Twinkies or Guinness. Such an innovative approach could rapidly turn this wonderful site into a cash cow of moving proportions. ;D