I knew it was only a matter of time before these started occurring.
Dwolla is the new PayPal ... shunned by the Bitcoin community.
I've seen mention that BitFloor has not yet had this restriction imposed on their customers. You might try transferring funds there to buy bitcoins.
Your best bet might be to try and find a willing trader in the #bitcoin-otc marketplace. Having a trust history in the -otc Web of Trust (WoT) will help in the future as well.