What I would do if I would publish an ebook. 1. Is the make sure it is a lot cheaper than the paper version, let's face it you don't have to use paper or ink, no storage, no shipping, a lot less manpower. So the price of your ebook should reflect this. I know a lot of publishers don't do this or even make an ebook more expensive than the paper version. 2. Don't put limitations on your clients. No DRM, no exotic formats, ... The person who bought your book should be able to enjoy reading it ony any device he or she wants. 3. Make it personal. Every book or magazine (PDF-format) I buy from php|architect has my name, email address and client number on every page. I don't feel like sharing those, but I can read it on every device (windows or linux pc, iPod Touch, Mac) I want to. No DRM, no passwords, ... Just my 2 euro cents.

Macbook with OS X cold boots in 25 seconds. Put it in sleep mode (battery decreases with 16%/day) and boot in 2-3 seconds