sorry for the tangent but I remember seeing a usability site where you could get usability testing for your site by 'pay it forward' by taking other sites for a test drive
Were you thinking of usabilityhub.com? They have a couple of different products for 'micro-usability' tests ('look at this page for 5 seconds and list things you remember' and similar). And I remember them using that model. You could pay, or be a tester to earn credit for your own tests.
anyone know what I'm referring to?
thanks!