I forgt to mention, I usually just transfer PDF's using the SD card. My work laptop has an SD slot built-in so I just swap that around to move my documents. I may stop this method and try using a mini-USB and mounting it to the PC instead. I'd like to try that instead and see if it any better.

For books I buy from Entourage I just download at home using the WiFi. Others that I buy from Manning (http://www.manning.com/) or O'Reilly I just copy onto the SD card. I generally add them to the library so i can keep the notes I make. Hopefully, this will be fixed soon so the SD card and just as usefull as the internal memory.