Do I need to transfer as bitcoins, or is there a way to transfer USD from one to the other.
If I have to first purchase BTC in Gox then sell it back to USD once my BTC hits CampBX, that's a $7 loss per coin just because BTC is valued less over at CampBX. Suggestions, please!
There nearly always are price differences between exchanges but what keeps them mostly in the same range is the result of the trading arbitrage that occurs.
Arbitrage is the practice of taking advantage of a price difference between two or more markets: striking a combination of matching deals that capitalize upon the imbalance
Arbitrage is not simply the act of buying a product in one market and selling it in another for a higher price at some later time. The transactions must occur simultaneously to avoid exposure to market risk, or the risk that prices may change on one market before both transactions are complete.
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http://en.wikipedia.org/wiki/ArbitrageThe reason traders aren't taking advantage of the current arbitrage opportunity between Mt. Gox and other markets is because there is no way to withdraw USD funds from Mt. Gox presently as they've halted that, temporarily, reportedly.
As a result, only those with excess cash willing to let a USD balance accumulate at Mt. Gox and at the same time send more cash to other exchanges (such as Camp BX) are the ones performing the arbitrage.
You too could send dollars to Camp BX (they have a number of methods in which they accept USD funds) but presumably you are not looking to commit additional USD funds but instead wish to use the same funds already at Mt. Gox. That's you and everyone else with that same desire, without any mechanism for that to happen.
Neither Mt. Gox nor Camp BX allow account-to-account (A2A) transfers of USDs so there's no way to get funds across from one account holder to another. If you'ld like to know how this could be offered again, ... BITSTAMP offers a Ripple gateway. If Mt. Gox were also to run a Ripple gateway as well then moving funds the way you are looking to do would be trivial.