I have a solution to international shipping from Click-N-Ship, but it only works if you have shipped to the same customer before. You log in at USPS.com and search you mailing history. It helps to have the date you last shipped, but beware, as the USPS webpage only get somewhat close to the date entered. Check the box next to the name and then select Mail Again and the old label will come up. Make the necessary changes in value and weight. Then select the shipping method and pay.
To ship domestically, I can either use my cell phone or change my UserAgent tag in my web-browser that tells USPS that I am using a cell phone, not a PC. This is complicated, admittedly; but I can do everything from my PC.
