Does anyone have a ballpark figure on how much data transfer a popular MP3/music download site like SoundClick.com or MP3.com (before it shut down and came back a hollow shell of its former self) uses? I'm sure they have plenty of server farms, dedicated backbones, etc., but about how much traffic do/did they do in a month? 10TB? 100TB? 1000TB? 10000TB? I'm sure there's an article in some business journal about that, but I haven't been able to find one.
I believe that depends on each particular web site and on amount of visitors they have. If you are planning something like that I recommend you start with small VPS. Then you will always have possibility to upgrade.