I've added myself to this experimental website for both published and unpublished authors. Work is judged on a single page and no names shown, to ensure unbiased feedback. Read any page 99, and click to record whether you would turn the page, and how likely it is that you would buy the book. It's an interesting concept, and once you start reading other authors' pages, it's difficult to stop.
Check it out at www.page99test.com