Hmm...nothing's changed with Gox/Dwolla?
So is there anyway to tell if this rally is because of the public's bullish sentiment, or because US gox users are converting their fiat into btc and hence causing a rise in price?
Buying Bitcoin is converting fiat into BTC.
I see what you're trying to do here, you're talking about some kind of mass exodus from MtGox because people can't withdraw USD from MtGox.
You're completely wrong though. If you want to make a withdrawal from MtGox you simply do a wire transfer.
If you can't afford to to a wire transfer it's because you're trading tiny amounts of USD - this won't affect the price at all in any way whatsoever.
The rally trades have been $10k-$100k - these people don't fund their accounts with Dwolla.
The standard way to move large amounts of money around the world has always been bank wires (SWIFT payments) - Dwolla allows people to send smaller amounts of money for less fees.
So to sum it up : Dwolla is irrelevant in the grand scheme of things.
It's useful (was useful) to people who want to purchase small amounts of BTC ($5k or less) with very low transaction fees.