Beautiful.
I have my own Rev A that'll be going into surgery this week (new bottom case, DVD burner, screen-latch assembly, battery) that I plan on keeping and using long after I have to return my Rev D (lent from work).
It's almost the same footprint as a sheet of paper - a MacBook can't even come close in terms of size. That amazing keyboard - MacBooks are nice, but I can type faster on the PowerBook keyboard. The screen isn't great, but I usually have it turned down quite low on battery power anyway.
Of course, it's not all perfect - the baby PowerBook was always plagued with an underpowered graphics card, low RAM ceiling, and tinny speakers. Never given the top processor, it was always in the shadows cast by its bigger brothers and often barely a step ahead of the iBook. Not to mention the early build issues with warped cases. An iBook can fall off a table and still look like it's showroom material, a PowerBook's crumple zones don't afford that level of protection.
Doesn't matter. until Apple puts an Intel processor and a real graphics card into a 12" chassis, you can pry my 12" machines from my cold, dead, fingers. $1000 ain't enough to take it from me!
(I also have a Cube and an iMac G4, so I appreciate Apple industrial design at its finest, even if it is flawed in some way or another)