Here is an inexpensive adapter that lets you use a USB Mini cable with your new Sony reader.
I bought one of these adapters from Deal Extreme.
http://www.dealextreme.com/details.dx/sku.41527
Using a standard USB Mini cable (used by a Garmin GPS, Nokia N800, jetBook, etc.) and this adapter, I hooked it to my PRS-650. It worked just as well as the Sony USB Micro cable, including charging the reader.
This is a similar adapter. I have not tried this one.
http://www.dealextreme.com/details.dx/sku.36150
Joe