Grand, this is something I'll really like.

Oh, two more questions:-

1) Any ETA for when BTC_PURCHASE_DISABLED is disabled so we can actually start using this system?
2) I see "Bitcoin transaction fees" are set to 0.5% on /view_contribution/, I assume you're planning to change higher donor's fees down fees down, is there any chance the $50 'donors' will see 0% fees? That may be something that makes me upgrade in the future if it is, and, if it is, will the purchasers of high-donates still have to pay their .5% fee (I remember seeing that both buyers & sellers have to pay a .5% fee, for a total of 1% per transaction)? I feel like making it cheaper for our clients would be something that many people would also very much enjoy, as for you, that seller would have to sell over $5,000 ($50/1%) worth of items for you to make the same profit, which, I somewhat doubt many people do, so, for you, it'd be a logical choice to make.