I am absolutely transparent: queued deposits are not "coins on hold" I used that money (along with my own money) to buy the new chips. However I will try to find a way to manage the change of the payout address, through signed messages, so people will be able to trade theirselves the accounts.
Great! You could implement an escrow service in order to avoid frauds, the message to sign could be something like:
[ Transfer account X (Y btc deposited, W btc rewarded, Z% of bonus) to address A if T btc are received on address B ]
Mmh, frauds are still possible: double sell :O So Pyramining.com has to know the next payout address before the payment.
This could reduce investments in new hardware :O