From the mailbag (now a Friday feature)
Answer: Since I've been cutting down on dairy lately I have a lower threshold for outrageous activies that I would perform to eat ice cream covered in chocolate. Nevertheless, I guess if pressed I would listen to three Celine Dion songs for a Klondike bar.
Apparently some other folks have done some thinking around this question before. Check out the 'What would you do for a Klondike bar? page on Geocities'. My favorite is 'program a cheesy MIDI version of the 'Friends' theme song'. If the question were 'What would you do for a Specialty's semi-sweet chocolate chunk cookie?' I might be as fanatical as the Geocities folks.
Thanks to Lane for the question. Though I'm not sure that this answer is any help to humanity whatsoever.