links for 2010-03-01

"The Live Edition is presently available as an Ebook (PDF, Mobi, and ePub) bundle, and the updated content will also be available through Safari Books Online and eventually print on demand. Customers who buy a Live Edition will get all the updates to the book up until the next new print edition of the book, when the cycle will start again. (For Learning Rails, customers will get all the updates for the upcoming 3.x version of Rails.)" [via @perryhewitt]