How easy is it to transfer say 1 bitcoin from BTC-E to Mt Gox, sell on Gox, transfer the USD back to BTC-E, purchase a bitcoin and repeat? (The only bit I see difficulty with is transferring the USD from Gox to BTC-E)
Thank you in advance for your help!
I do it occasionally using Gox - OKpay - BTC-e when the spread gets wide enough. The key is to have money waiting in OKpay, because sometimes there are long delays getting USD from Gox to them (24-48 hrs when Gox doesn't have their OKpay account funded), but transferring USD from OKpay to BTC-e is instant. It costs about 4% to do this, but when the spread is 11% like it is now, it's worth it. (There's also the risk of placing your money with BTC-e as well, it seems to be a bit of a minefield lately.)
I don't think there is a way to transfer USD from Gox to BTC-e, or OKPAY account. At least it is not in the withdraw menu.