Thanks for your answer!
It's funny how the memory plays tricks, because I was sure that I hadn't seen the ADE folders/files before. The only time I look is when I side load a firmware update usually, and I just don't recall seeing anything ADE.
I wondered if it was something new and seemed to fit into Adobe's recent interest in sending book information back to Adobe. I never use Digital Editions, although I've got v2 on the PC. (I download with Sony Reader for PC).