I also used gtkpod to clean up the ID3 tags on many of my MP3s today. It looks like it edits them on my Gentoo Linux desktop machine and on the iPod immediately and quietly. Nice! I was very happy with how this went. And it’s great to have my ID3 tags more consistent.
It makes the iPod much more pleasant to use.
I also ripped about ten more CDs and synchronized them on the iPod.
Previous iPod song count (as of yesterday): 809
Current iPod song count: 957