Please be aware that Mtgox/Dwolla is not the only option to convert Bitcoins to USD in US. For example there is an exchange from which you can withdraw with ACH to your bank account for 2 USD: https://campbx.com/faq.php
I recommend you stop using Mtgox at all, because of ridiculous ways they freeze accounts and call the police on the customer for absurd reasons.
For example: https://bitcointalk.org/index.php?topic=78596.0
To make the long story short: customer had a verified MtGox account, an ordered a withdrawal to an account of another person mistakenly thinking he could do so (the fact that the other person was his wife is irrelevant here, it could as well be just another person). MtGox instead of simply answering: we don't do that, please use your own account, froze the customer account, and called the police!
Its like if I went to a train station/airline which doesn't have services to for example Alaska, and ordered a ticket to Alaska, and the train station/airline instead of simply answering: we don't fly there and returning my money, they would take my money and call the police. Absurd. That's exactly like MtGox behaved in this situation.
Sending money from your exchange account to third parties is nothing generally forbidden, and many currency exchanges do that, for example: http://currencyfair.com/http://currencyfair.com/perfectforhttp://transferwise.com/
These are large well known currency (not Bitcoin) exchanges compliant with all AML laws, and they do it, so it is NOT something generally forbidden/suspicous by AML laws, its simply MtGox business decision, and their choice not to do these, fair enough, just as not flying to Alaska. But freezing funds and calling police on the customer who asks for it is simply unthinkable.
Lets even try a more critical example: Even if I walk into a bank, and fill out a form for a transfer and specify a recipients address in Iran, and lay a bunch of bills on the table, I am sure the teller won't grab the bills and hide them, and call the police on me - he will simply say: "Sorry, we don't make transfers to Iran.". If I walked into a bank, asked for a transfer to Iran, and the teller grabbed the bills and refuse to send/release, its me who would call the police on the teller for stealing my money.