Hey all, how many of you are using both Coinbase and Circle?   I am wondering your thoughts on if you think some thin arbitrage opportunities may arise between the two.   As of this post:

1BTC on Coinbase: $482.94
1BTC on Circle: $486.23

Obviously there are fees for both on withdrawing, and I have not yet withdrawn any funds from Circle to bank or Credit Card.   I would say that both sites are equally easy to use.   The main difference being the ability to use a credit card on Circle.com.   

Circle also has the ability to withdraw funds to a credit card (which is an option I haven't seen available) besides on BTC-E.


How many of you have switched over to Circle from Coinbase?  Does anyone know which exchange Circle is pegged to?