I got about 2000 songs on my old 16gb iPod and it still has room for more..
I plug it in the usb that's hidden in a compartment and it just runs and runs. With the sync you can talk to it and request artists, albums, songs, etc.. That is, when the sync actually works, but for the most part I just let it run on random... :)
My 13 actually has a built in CD player, but I only use it when I buy a CD from the thrift store for $2.00 and want to listen to it before I burn it to the iPod..
Anyway, that's what works for me.. :)
I hated the Sirius sat service thing it came with it when it was free for 6 months...
I wish it had HD radio is all, but the usb and iPod works well.
Good luck!
Mitch