As of today, moodboard is closing its microstock activities:

"moodboard will be suspending all uploads to its microstock collection from 15th October 2010 (15/10/2010) to focus our efforts on our Premium content collections."

see also http://www.moodboard.com/photographers/mymoodboard.htm

edit: changed title

Given that they're now offering their stuff on iStock via the Agency Collection, perhaps they figured that was enough microstock for them?