Psion,
Must have missed those posts. (I do work during the week now you know. Need some way to keep up with this great stuff.) But yeah I feel the same way. Planar handbook was like "Hey lookie! Planes! Players want stuff from them!"
BCD "Planes are where wonders, horrors, nightmares and dreams collide." There might not be as many mechanics but the fun in reading and playing, way, way, way better.
Tur,
Like Psion said, if you want a non-DTR thingie, WW does supply a less secure site to download PDFs off of. (That was how I got Malhavoc Press PDFs before DTR came out.)
John,
Each plane is about 10-20 pages yes. But really it's more fun to kill trees this way via printing.
224 pages and it only cost me 17 dollars. PDFs rule.
Krypter,
Much like Psion said, each plane (for the most part) is kind of almost a demi-plane that either drifts in and out of the Great Wheel, or even flexes beyond the normal deal of Great Wheel. (Remember the Infinite Staircase? Well think that only way cooler.) I'd say about 75-85% you can use in a Great Wheel setting, making most accessible much like Eberron's cosmology is set up.