Bytemaster is awesome - looking forward to BitUSD going live today 
Bter add the BitUSD/BTC pair https://bter.com/trade/bitusd_btc
That was quick to be added on a reputable alt coin exchange.
Did Mintpal, Poloniex, Cryptsy addded the pair yet?
Not yet, Bter was first.
Next probably will be btc38 or poloniex, they already trade BitSharesX (BTSX), all rest should integrate BitSharesX first, it's not Bitcoin style coin and required additional work in order to integrate it to exchange (like Nxt or Monero for example)