[mseydel]

I feel a bit sheepish; I haven't actually tried a DVD on it yet.
But when I'm using Photoshop from the couch via my Wacom tablet,
it usually drains in about 2 hours or so...

Not sure that it's helpful, but one thing that makes this 'book so useful to me is having a desktop setup at work to plug into to reduce some of the stresses that working on a laptop on your desktop can cause: i use an iCurve to rest the 'book on to keep it cool and at eye level, an extra Apple Pro keyboard so my typing won't get cramped, and of course, a Wacom tablet alternately for writing (via Ink) and drawing/retouching. And yes, when I'm greedy, I liberate a nearby Apple 17" LCD for more real estate...