I have been working on major updates for the UPS, USPS and Fedex shipping modules for a number of months now. Due to time constraints, I have not been able to upgrade these to work with the latest version of the shopping cart. If you have a cart version 184.108.40.206 or Earlier, I will be posting a patch for the common versions of the carts to upgrade you to the latest USPS and UPS modules.
To get a preview of some of the changes for USPS, check out my Wiki article here .
I am working on fleshing out this Wiki with common issues and requests and walk through instructions for setup. I know all too well the trial probably best portrayed by this XKCD comic .
I hope to have these patches published this weekend.