I am finding very low prices on some music when buying entire albums. A few caveats:

• For Mac users: buy music using Safari and not Firefox or Camino
• Downloading is a one shot deal: Amazon encourages you to immediately make an archival copy of purchased music

The album down loader is nicely integrated with iTunes – I hope that Apple does not try to break this convenient integration.

In addition to saving money, this is a huge time saver for me: when I buy music from the iTunes store I always make an archival copy by burning an audio CD, then using Tunes to rip to MP3s, then add the MP3s to my permanent backups – this was a time consuming process.