Just a brainstorm really, I am not currently planning on building this.
The premise is that we create categories and in each category contains multiple services that do not take bitcoins as currency.
The community then submits bitcoins into that category in order to create a bounty.
It then turns into a race, the first service in the category to officially accept bitcoins Wins! ..The company get the monies or have a choice to donate it to a charity of their choice.
If people fund this "bribe" service then I think it could work, the operator could take monies out off the coffins to mass mail the companies to make them aware of the bounty and benefits of joining. Plus the whole X amount of people want you to accept Bitcoins they have together built up the fund of Y BTC / $.
To make it more "fun" for the people contributing you could add a gambling dimension to it as in bet which service adopts bitcoin first.
Just an idea to fund PR really, once theirs a critical mass using bitcoins the rest should fall in line.