I'm afraid the 30mil was misinformation. According to
http://agran.net/bc_getbalance.php?top=100, the top addresses hold 40,973,569.05. That's worse distribution than the ~39mil I posted last week. (You can see that easily in my tiny post history.)
well it depends on how much is held in exchanges.
there was over 3500 btc traded on minpal alone which is about 10 million blackcoin.
Across all exchanges you could probably assume that there is between 10-15 million on exchanges.