Thank you for the input, everybody.
I have zero desire to make another microwallet affiliated faucet; I think I'll just proceed and see what the balances look like on a daily or weekly basis and figure out the payout method based on that.
I know this is bitcoin talk, but I'd like to offer the choice of Bitcoin or a couple of alts. Primecoin, peercoin, what other ones are people interested in?
There are other services that work in similar ways that microwallet works but are competitors with microwallet (I believe one example is coinbox.me - however I cannot testify as to the trustworthyness of them nor of microwallet).
Anyone who would claim payments from a faucet that does not work with a microwallet like service is a sucker (then again so is anyone else that uses faucets) as they will likely need a very large amount of 'claims' - likely more then they would be interested in continuing to use faucets - before they can receive a payout