when I was trying to sign in on my amazon app I was getting an error message to try again later... WELL... after clearing everything and rebooting to no avail, I called amazon and found out that I had used up my allotted amount of "devices" that I can use the app on... basically, every time you use a different ROM and sign back into amazon, it is considered a new device... the dude on the phone was real cool and just cleared out all the past devices for me. now I am good as new... NOW since I got Nav working and amazon app store working... I am NOT leaving this lean and mean ROM... I am really impressed with it... I uninstalled launcher pro and use adw ex with all of the liquid goodies... this is a very well built ROM...
SO, if you ever hear of anyone with the same amazon problem I had tell them to go to the website and clear the devices under the apps section