I would love to use Mechanical Turk for a number of activities however, I can't believe you still need to be in the USA with a USA bank account to submit jobs? Ditto for Amazon's payment system.
It's interesting, but there are better-tuned services for this.<p><a href="http://www.usertesting.com/" rel="nofollow">http://www.usertesting.com/</a> comes to mind.