I think they are testing NMC IXC DVC merged mining.....
Would tend to agree with that.. ghash.io shows that too.
119 2013-11-11 12:41:43 5000.0000 1/120 5 minutes 22816/1000002375 0.00%
Can also see it in the raw data that shows up on the cex website, but it doesn't actually display.
['7443218', '2013-11-11 12:50:23',0.00123728, 0.06859045, 'mining', '', undefined, 50.0200, 24736, 1000006784, 'undefined', undefined, 'undefined', 'NMC', undefined, 'undefined', undefined, undefined, undefined],