How To Rip the Sound from an FLV (Youtube) to MP3 Using Ubuntu Linux

I love this video because I've done a lot of bike riding like this in NYC (watch out for car doors), and the song has a nice hypnotic quality to it.  Wouldn't it be great to have an mp3 of the song for my iPod?
Here's how you do it on Ubuntu Linux (or any Linux for that matter; probably cygwin too...). 

1. Go to the page with the video containing the song you want
   
2. Download the video (try http://www.videodl.org/ or  Grease Monkey Add-on style)
   You'll end up with a .flv file sitting on your desktop.  Great, it's time to rip it.
   
3. First, install the all purpose audio/vidio conversion utility ffmpeg.  Don't worry, you can do this in one command.  Open a command prompt (Applications->Accessories->Terminal) install it with aptitude:
   
4. Now rip it to .mp3. Super simple with ffmpeg.  1 command:
   
   
   There you have it, a 3.3M .mp3 of the song from the vid.  (I only knew the song name from dirtypigeonandthetar's post in the comments.)
   
5. Move it over to your iPod with gtkpod, and you're all set.