Two addresses hold 90% of the coins?
I assume those are exchanges
Those are pretty even numbers for an exchange. Bter is the only exchange that really has any volume. I'm going to withdraw some and see if those balances change.
1 DGFA65jcSuazPCcP5PUpTdpYsGBKu9HFEV 940 001.20000000 dtc (57.73 btc / 25 630.69 usd )
2 DE5fExMsvuZv3WXC5ZjcskVhigs9VQrBYG 660 760.00000000 dtc (40.58 btc / 18 016.71 usd )
3 DTz6SYurYX9zRhugEmEhAX1pmfLtLasm91 79 391.30000000 dtc (4.88 btc / 2 164.74 usd )
It is not 90 percent, just about less than 50%. Watch the total mined coins in the mentioned homepage (More than 3.6 millions.)