By the way, should we maybe collect bounties somewhere so that the full reward comes in at once?
Just what I was going to suggest. I wanted to write about it later, but since you beat me to it I'll go ahead.
If we want this drive to be successful and scalable, it needs to be better organized. I propose the following:
1. We agree on a uniform set of rules for eligibility for a bounty. Those in the OP seem good to me, but we need to clarify in what form we would like the entity to announce its support for Bitcoin (a separate page without any link to it is not good enough IMO).
2. Mahkul will create a MyBitcoin account to collect pledges.
3. Pledgers will post, either here or in a PM to Mahkul, how much they will pay for each conversion, and how much they wish to deposit. They will send the pledge to the MyBitcoin account.
4. Mahkul will update the spreadsheet with the pledges and deposits for each.
5. As we have now, persuaders will announce their intention in advance, it will be checked and added to the spreadsheet.
5. If the attempt is successful, the persuader will post news of the success, along with a receiving address.
6. Mahkul will judge eligibility according to the rules specified. If it's valid, he will send the total amount, and deduct the appropriate amount from the deposits of each pledger.
7. If a pledger sees his deposit is running dry, he can choose to either deposit more or discontinue his pledge.