For the pricing model - one of the reasons was that as this idea occurred to me just a few weeks ago, and calendars are a time-sensitive good, I don't have the time to make a contest and a search for sponsors that's going to take a month or more. Plus, this pricing model increases the urgency for the potential sponsor to make the call one way or the other. But the main reason, I guess, is the fact that I have no clue how to price such a perk / service at all. So I figured I start small, but if there is interest, then the companies who jump on board later are going to have to pay a premium.

Yes, dream interpretation :) I don't make much of my dreams usually. But that particular one sort of got my imagination going. Appreciate the recommendations as well, will see if/when I can get to these, my "to read" list is way too long as it is...