Buttercoin officially launched today, bringing what it calls a "reliable, domestic bitcoin marketplace to the US", one it believes provides the first advanced foundational service to the ecosystem's largest, and perhaps most complex market.
...
Founder and CEO Cedric Dahl framed Buttercoin as a competitor to major international bitcoin exchanges, which he argues are ill-equipped to satisfy the needs of a business clientele that includes merchant processors and mining facilities, companies that may need to sell 200,000–500,000 BTC at a time to ensure their finances.
http://www.coindesk.com/buttercoin-bids-take-us-business-global-bitcoin-exchanges/
big words
. time will tell.