Mt. Gox says they won't drop Dwolla at any time in the near future (recently, as of yesterday) link: https://support.mtgox.com/entries/20317238-announcement-dwolla-transfer-option-will-remain-available
So that will remain open.

On the point of converting to BTC: You are then taking a risk, which I'd rather not take. It will take an hour or more for the BTC to get to you from tradehill. Then another 1-2 hours to get to Mt Gox to get back to USD. What if the market tumbles during that time period? I want the USD that is owed to me, in full.