Actually im more concern on the regulation aspect because my services are just like Dwolla.
I transfer dollars to MtGox and paypal is the responsable for making the conversion of the money from brasil and the user agree under the terms of conditions that he is the responsable to respond for the internacional transaction, i dont request any payment, they send the money to a US business (me) to transfer funds to MtGox.
I lack the knowledge to know if i maybe fall in any pitfall or if i can use the actual legislation to fully regulate this business.