Originally Posted by QuantumIguana
For the most part, people don't sideload content onto their e-readers, they prefer to use WiFi or 3G.
I know plenty of people who sideload--however, they're certainly not in the market for a device like this; sideloading's enough of a nuisance that it's often done in large batches of books. There's the occasional "ooh, favorite author has new book; must add that NOW," but otherwise, it's "I've got one from here, and one from there, and picked up 5 new short stories from Smashwords and a new backlist novel from CafePress, and that freebie bundle..." a reader that only holds 5 books is useless to many sideloaders.
I'd expect, with how little the ereader manufacturers are supporting sideloading, that it doesn't require that, but expects you to load your Amazon or Kobo or B&N ebooks to the device, by means of weird proprietary software that only works with a few major stores. It may not have *any* sideloading options.