This was posted on our listserve by a previous crit partner of mine Joan Edwards. It is full of information from Ray Rhamey.
He's got a book out, entitled, Flogging the Quill. I'm going to buy the book. He critiques first pages for free and then other authors also respond as to whether they would read on or not.You give permission for him to post your first page in exchange for the crit. And we all know how critical that first page is. An agent is about to open your envelope with the first three or so chapters. He's/she's tired. They have read umpteen, dreadful first pages, throwing them in the rejection pile. It's late, he's reading your first page. You want it to impress the agent,you want him to request a FULL. This first page is crucial.
The site has some great info, even if you don't want to submit a first page. Check out, Story As River. There are helpful tips all over his site. Try it, you'll love it. :)