Good discussions guys, keep it going.
I would have to agree with Shaad in terms of not having a tiered system and having a set goal for any donation collection initiative. That way people would be more interested in making that goal a reality.
There's also a direct relationship with a goal and the timing of achieving that goal. As we have just learned, we missed out on gettin the PA ad out on the day Bangladesh played Eng and there were a lot of people questioning the necessity in publishing it the day after. We got lucky; Bangladesh won and we all looked like geniuses when the advert showed up on PA along with Bangladesh's match winning reports. Since the timing worked out in our favor, quite a few more people donated without making a pladge earlier in the process. So I think what ever we want to do where donation is a must, timing is of essense.