I was just wondering if anyone else has used http://peek.usertesting.com before? I came across the link on Twitter, and got them to do a review on my Portfolio (you can do up to three sites a month free). 48 hours later, I got sent back a 4 minute video of someone using my website and commentating throughout about what they liked/disliked, and why they clicked in certain places (It's also interesting to watch where they put their curser!).
I'm not sure who the person was behind the video, and wether they were also a web designer etc, but to me it sounded like a genuine 'guinea pig'. The site is currently in beta, so will be interesting to see what direction Peek goes in.
I've put this in the Reviews/Feedback Section, as I think this can be quite a useful resource!