I really wanted to have a revised version of my book available by now but my job prevents me from working on it. Being in the Navy, and deployed for several months, means I don't have a lot of off time to work on it. Though I have some free time during watch, I'm not allowed to bring my laptop into the shop so I can't work on it that way.
Thankfully, when I do have time to work on it, there isn't that much that needs to be modified/updated. The main thing is adding more information about Python 3. Since Python 3 has been out for a year now, it's more mainstream. I may actually rewrite the book to showcase Python 3 and just add a chapter talking about Python 2.x. I figure most people will be using Python 3 but some *nix distributions are still using the older versions of Python, so it's good to know what the differences are.
So, when I get a chance, the next edition will be posted to a web link and torrent sites, like the current edition.