The Barnes & Noble e-book reader, Nook, can view ePub, eReader and PDF, can read MicroSD cards, has a little color touch panel instead of a keyboard as well as an e-ink reading surface, has complimentary 3G cellular network access (AT&T) and Wi-Fi, and costs $259. It supposedly runs the Android operating system, though I suspect that doesn't have any implications for end users or even hackers (much like the Kindle runs Linux). Also a neat (but closed system) "lending" feature to share with others that have a Nook reader or free computer software that runs on Windows, Mac or iPhone.
The catch? Barnes & Noble's e-book store sucks. Pretty much all of the books I've seen available for the Kindle that I'd want to read aren't in B&N's store at all. Their browsable catalog is missing entire categories available on the Kindle. I presume I could try to find ePub/eReader versions of those titles from other stores, but that throws me back to the pre-Kindle state of the e-book universe, where e-books were hard to find, buy and manage. They have to nail the store, or it's useless. Amazon got this right, and will continue to lead even with a proprietary feature-weak format because of it.
My upcoming book will supposedly be available in several e-book formats, including ePub. But from the looks of B&N's store today, I'm doubting it'll be obvious how to buy a Nook-compatible version. Here's hoping.
I'd be excited about the PDF support, but a PDF on a small screen means you'll be scaling or sliding the display around to view a page, not walking through the text like with e-book formats. The $500 mega-Kindle supports PDFs and that makes sense because you could easily read a full PDF "page" on the screen. It's gratifying that I can easily copy my own text to the Nook for reading (unlike the Kindle), but I don't have high hopes that it'll be useful—unless it can also do HTML or plaintext.
Nothing on the site about a web browser, either, nor Wikipedia. Out by November according to a press release, though of course it doesn't say that on their website.