There are also pay-per-use options that include calling 411 directory assistance, downloading ringtones, downloading games, roaming (taking calls and receiving texts outside of the coverage area), making international calls, and more.
Some sites offer downloads for free, while other sites are paid downloading sites; just keep in mind that you will need to download tracks that are compatible with your operating system or that can be played in your karaoke machine.
After downloading these music batch files -- "torrents" typically contain entire albums, discographies, or collections -- you can either burn the music on a CD or upload it to your favorite portable MP3 player (like the iPod nano).
In the US, the RIAA filed hundreds of lawsuits against users of file sharing network, and in 2009 landmark legal decision, a judge ordered a Minnesota woman to pay a fee of several hundred thousand dollars for downloading music.
Users had difficulty making the dock work, while others were just generally dissatisfied with what the dock offered for the price - the dock isn't a necessary investment for downloading to your iPod, it simply makes it easier.