I’m not condoning stealing music from the internet BUT there was one instance where there was a special mix put online on imeem and it was not sold on iTunes or Amazon, so I had to resort to finding a way to download it another way.  My search came up with Free Music Zilla.  Basically, you download this tool and it lets you rip the MP3 or FLV file from popular social media sites like MySpace, imeem, iLike, etc. onto your computer.  Many times, the file will be an FLV which you cannot use directly on your iPod so you’ll have to convert it.  I’ve also found another website where you can convert it to an MP3 online without having to download yet another tool at flvto.com.  Free Music Zilla limits you to I believe 10 songs a day so that you don’t go crazy trying to grab as much music as possible.