[ctkrohn]

I think Myspace actually HAS become the standard for such bands, at least for the music that I listen to (metal/punk/hardcore/indie/experimental). You can look up pretty much any band by Googling "band name myspace". You'll get the tour schedule, blog, link to the record label, etc. Often the Myspace pages are designed by the label itself, incorporating the artwork from their latest album. Here's a pretty good example:

http://www.myspace.com/kylesa

Myspace took over from mp3.com after it shut down in late 2003. There was some early competition (at least in underground rock) from purevolume.com, but Myspace's social features won the day. Myspace is still the standard for bands and will likely remain so for a long time -- but "social network for teens and twentysomethings who are into music" is a far cry from "social network for the entire world."