hi
A hard disk based bookCourier would have significantly less battery life. And, although an IPod may come with 40 gig or more, I personally have never had a problem with 4 gig. I can keep a hundred hours of Audible.com reading material and 50 hours of music on a four gig card which pretty much gets me through.
Just my two cents.
-- Blue skies. Dan Rossi Carnegie Mellon University. E-Mail: dr25@xxxxxxxxxxxxxx Tel: (412) 268-9081