hard drive upgrade?

[Chris Volpe]

Greetings iBook listers!
Since the question of upgrading hard drives in older 'Books has come 
up, I wonder if anyone has any experience with doing that on the newer 
(non-clamshell) models. All I've seen on the Web has suggested that 
it's not an end-user upgrade as far as Apple is concerned. But can 
anyone point me toward info on swapping in a fatter drive in the newer 
'Books (I have an 800)?
Thanks for any info, warnings, scoldings, inspirations, etc.

Chris