"Modern equivalent of the business card" - mattkeen got it right. I find mySpace complimentary to my website, not in competition with it, because it has different aims: quick spreading of the word, snippets etc whereas on my website I can go deeper with biographies, photos, links etc.

There has definitely been music that I would not have heard if it were not for mySpace, loads of excellent stuff.

My autosignature on email shows my website, however.