McNally Robinson are selling the printed version too.
Copia — multiple hardware and software platforms.
eBookPie — multiple hardware and software platforms.
Kobo — Touch, Wi-Fi & Vox + apps for Blackberry, Android, Mac & Windows.
Amazon.com — All Kindles + apps for iPhone/iPad, Windows, Blackberry, Android & Mac.
Indigo — They just sell you one from Kobo, but what the heck?
Barnes & Noble — All models of Nook + apps for Windows, Android & Mac.
Sony Store — Reader Wi-Fi + apps for Windows, Android & Mac.
Apple iBookstore or use the iBooks app.
Running Linux, FreeBSD, Symbian etc.? No problem!
Running PalmOS? No problem!
Need the B&N Nook for Android app but live in Canada? Contact me for instructions.