I got to order one tonight through the rewards website again!
Still haven't received an email however after reading that orders were taken for members here I gave it a shot and have a confirmation of order, hopefully this time I'll get a confirmed *shipping* date instead of the dreaded cancellation email like back in Oct.
As soon as I added the prs500 (search rewards site for Reader, not the drop down box with only 505 & accessories listed) the special price was automatically adjusted and I only had to purchase the 58.xx points.