I can pay with Dwolla if you know how to accept a payment from me without the 30 day restriction.
Post your request here, and you'll likely find someone willing to trade:
USD between MTGOX <--> DWOLLA -
http://bitcointalk.org/index.php?topic=78512.0- Square account to Square account
What's that about? Does Square let you as a merchant use your revenues for paying to other Square merchants?