UPDATED: Rip to iPod v2.1
Rip To iPod v2.1 will import each enabled (checkmarked) CD track to iTunes and immediately copy it to iPod, removing the track from the iTunes library and deleting the original file, thus giving the appearance of seamless CD-to-iPod importing. You can also change your encoder on-the-fly and your Preferences-set encoder will be restored after the rip. Requires that iPod be set to "Manually manage music and videos". iPods set to sync are ignored.
This latest version fixes an issue with intermittent copying.