Why you should try UserTesting.com by Pete Warden.
From the post:
If you’re building a website or app you need to be using UserTesting.com, a service that crowd-sources QA. I don’t say that about many services, and I have no connection with the company (a co-worker actually discovered them) but they’ve transformed how we do testing. We used to have to stalk coffee shops and pester friends-of-friends to find people who’d never seen Jetpac before and were willing to spend half an hour of their life being recorded while they checked it out. It meant the whole process took a lot of valuable time, so we’d only do it a few times a month. This made life tough for the engineering team as the app grew more complex. We have unit tests, automated Selenium tests, and QA internally, but because we’re so dependent on data caching and crunching, a lot of things only go wrong when a completely new user first logs into the system.
Another approach to user testing of your website or interface design.