PayPal is an online payment system which can be used by bands to receive donations. They have a powerful API, to allow easy integration with other websites. One can just place a "donate" button to MySpace or set up a more complex donation system.
is the associative knowledge network. It has been called "Wikipedia of associations" or "Last.Fm of travel", because you can type in anything you know and like, and the site will show you everything related.