Buttercoin – US-based Bitcoin exchange
There are a few US based now right?<p>Can the market support so many US exchanges? (do any have working USD ?)<p><pre><code>   buttercoin (no selling yet? ACH? wire? CC?)
   coinbase   (technically not an exchange but USD works)
   campbx     (bank halted ACH/wire transfers on January 31, 2014)
   kraken     (located in SF, USD back soon: https://news.ycombinator.com/item?id=7321703 )
   coinsetter (in beta, bank approved USD)
   cryptsy    (located in FL, USD soon, registered Money Services Business/BSA/FinCEN)
   coinlab    (never opened exchange)
   coinmx     (may not actually be in US, overseas CC charges, be careful)

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