While Sony's Reader has never received the enormous press or enjoyed the supposed whirlwind sales of Amazon's Kindle e-book, and is certainly lacking in, erm, EV-DOness, the Reader is about to get one trick the Kindle doesn't have yet: openness. Sony will be shooting out an update on Thursday to allow the Reader to use purchased books in the protected EPUB format from whoever is peddling them, instead of being tied to the Sony's e-book store, or just DRM-free text and PDF documents. That openness should help Sony beef up its selection -- which is lagging behind Amazon's -- and will hopefully mark a bit of a turning point in the e-book market to more standards and, more importantly, more books.