I want to know everything that is wrong (and right

with this sales letter. Tear it apart. Shred it and let me know what I need to do to improve my copy skills.
BTW, I did take some tips from this board to improve it.
Conversion rates for this letter vary from 2% to 8% depending on the source of traffic. I've sold over 100 copies of the eBook since it was launched in July.
http://www.numberoneinyourniche.com
You can see a couple of other sales letters I've written here to get an overview of my style. I would love a critique of those if anyone has the time.
http://www.trafficturbocharger.com
Priya Shah