drugs->bitcoins->mt. gox->USD->Dwolla->Bank Account
A buyer would do the above actions in reverse.
As it stands today there are many, many ways to perform that chain of actions. I personally funded my Mt. Gox account with Dwolla because it seemed like the only above the board operation out there.
drugs -> USD -> mattress -> grocery store
drugs->bitcoins->mt. gox->USD->Dwolla->Bank Account
A buyer would do the above actions in reverse.
As it stands today there are many, many ways to perform that chain of actions. I personally funded my Mt. Gox account with Dwolla because it seemed like the only above the board operation out there.