Still think it's great, though I honestly haven't used it too much recently. Extracurricular books = time sink. Then again, so does perusing many forums on the internet.

Haven't tried using any fun utilities yet, though PDFrastfarian (sp?) looks enticing.
I still use paper back books (for "leisure"); however, if Sony/Connect ever does a library-type or subscription-based (certain # or unlimited books for $$ a month?) model, not to mention enlarge its selection by leaps and bounds, that can always change.

It's either that or wait till Google et al. finishes digitizing every known book in the universe...