Music!

My sister is a singer-songwriter. Her songs are great, and you can find them in the usual locations: MySpace Music, Last.fm and Facebook. Interestingly, though, she’s decided there are different purposes to each:

• Her Last.fm page contains more polished recordings.
• Facebook has those too, but also contains more rough-and-ready demos, ideas and experiments; it’s also updated the most, probably because she spends more time on it than on any other site.
• The MySpace page seems to exist because you’re expected to have one.

I wonder how common this is? Any other musicians care to comment? Is there one best place to promote yourself as an independent musician?