I'm thinking about getting one of the refurbished 2GB Nanos that Apple is selling for US $99 and using Rockbox on it, primarily for audiobooks and podcasts.
This is potentially a stupid question, but here goes: would having large files (in other words, larger than the buffer itself) adversely affect battery life on the Nano? Or would the difference be negligible since it's reading from flash, rather than a hard disk?