This looks like a very good, mostly fluff product for the new Planescape campaign setting. I thought the planar materials were particularly interesting, as was the section on planar services detailing the types of trade goods produced on planes, in burgs and in gate-towns all around the Great Wheel.
Fire fruit is definitely going to get some use in my next game, as will the Bytopian Bottle and the karach weapons and armour.
Overall, a good (though shorter) update to the Planewalker's Handbook.
So what did you like the most about this new release?
(And if you have ideas for things to include in revisions let us know!!)