i've emptied my home computer and work computer mp3 contents onto it (ca. 600 songs) and have barely hit the 2.0 gB used level. it will take some work digging up my old (select) cds and ripping them all to the powerbook.
being a designer / photographer by trade, i deal with huge graphic files on a daily basis, often transporting files between work and home. in the past, i've tried to only burn CDRs for transport when necessary. often the 128 mB flash drive isn't big enough and i've been known to really blow through plenty of the 'disposable' CDRs instead... but not anymore. this fancy 20 gB gem has already taken over the position of file-transporter for me. and with the fire-wire i spend merely a fraction of the time copying the files and toting them away.
i scored a great, newly-released case for it, which is equally fabulous. as soon as i find a link to these cases i'll add it here as no iPod owner should miss this line of uber spectacular iPod cases and bags. stay tuned.