Bitstamp, the first and only fiat/bitcoin interface built out of two cans and a string, has announced they are moving their cans to new software which would put them on an XTCoin fork of the Bitcoin blockchain. The XTCoin effort has been dead in the water since September when MIT sacrificed their "technology review" in an attempt to make XTCoin politically palatable. There is no word on any potential plans by Bitstamp to add a third can or more string.
IIRC they rewrote everything in javascript with they got h4xx3d. Webscale.