Very slow but they only just opened about three months ago. I've had two sales there ($12.50 in commission- they pay 50%) from 500+ images - but they have paid me a healthy chunk for uploading prior to the site opening (and the money's in my bank now). Their interest is in Middle East related images, not general stock.
They tell me that they expect it to take about a year for sales to really start to take off, which is not unreasonable, and that they are serious about breaking into the market. I'm keeping my fingers crossed.