Hey everyone,
Thanks for all the good tips.
Darrel, you're 100% right about the testimonial. I'll talk with my client and see if I can get him to let me use his information. In his world he's one of the biggest names, so if I can get his name, it'll be great for me.
Trease, You're right too. I've had trouble with the "I's" in this letter. I've done a lot of work to weed them out, but with each revision I seem to keep adding them back. Whoops! I think I'm going to put a big note above my desk with "WIIFM!"

Kyle, I do respect those two writers, however I didn't come up with my hypnotic copy from Joe Vitale, so I don't feel I owe him fealty. The story in my letter about my history as a hypnotist is completely accurate, which is something I haven't seen any other writer's market themselves with.
I do need to work on proof in the letter though. At the moment I'm waiting to hear back from a number of clients who've recently launched with my letters, so I should have plenty of testimonials in the next couple weeks to add.
Thanks everyone for the comments. I'll be making a lot of changes this coming week and plan on starting split tests near the end of the week.
I'll let you know how it goes.