The internet as a promotional tool.

Advantages:
Viral marketing; making information easier to access and granting the ability for a link to be passed from fan to fan.
Community; creating a sense of community for an already existing fan base.
Recognition; newer bands can use the internet in order to gain recognition, accessing the technological generation (many people using computers), pitching their music to a particular audience (unsigned bands on myspace).
Accessibility; the internet is widely accessed.
Technology; has advanced majorly, allowing more things to be done.
Image; allowing the band to represent themselves.
Conventions; using conventions in order to pitch to particular audience.
Audience; allowing them to reach a wider audience.
Contact; allowing fans to contact the band.

Disadvantage;
Hacking; could ruin this advertisement.
Technology failure; risk of the website crashing, which could then loose money.
False advertisement; viewers could be shown something that isn't genuine.
Server space; if there isn't enough space on the server, then what is promised cannot be provided, again loosing them money.
Communication; panic can cause troubles in communicating, making false promises.