What's Your Take on Unknown Music?

Music sites featuring unsigned artists are huge online.  Teenagers are swarming to them in search of the next big thing.

But, as an adult, what's your take?  We're all used to the "old-fashioned" way of getting our music.  We rely on the radio stations to introduce us to new music and up-and-coming artists.  Or do we?

What's your take on this new music scene?  Would you engage in the music communities featuring new artists?