Consider being solely your own pool once you gain popularity as vanitypool takes 20% fee already subtracted from reward shown(reward shown is actual payout on vanitypool, add 20% for total fee end user paid for address)
Take 2% from reward shown for payout on bitcoin-apps pool.
vanitypool seems to hold funds in a separate wallet for each address submitted
Is there anyway you can choose the easiest addresses first from vanitypool to make sure hashing power is going to good use vs going for the highest reward and we just clear out the backlog since you are in beta?
Also if you ever decide to shut down the pool I'd love it if you sent me your source and I'd gladly keep it going :-D