A press release popped into my inbox this morning. Shmoop (a maker of study guides) proudly announced that 400 of their titles were now available in the Sony Ebookstore. So what? I did a little digging, and you can find all the Shmoop study guides at Amazon and B&N. (This is why I dislike most PR departments).
But it wasn't a complete waste of time. I sampled a few of the study guides, and they were actually pretty good. The Kindle store samples were concise, coherent, well organized, and well formatted. And they were cheap, too, priced under $3.