Classical music and social media

Hello all, 

Following the IMSLP vs MPA debate:

http://www.techeye.net/internet/rachmaninoff-at-centre-of-sheet-music-copyright-feud

I noticed how "backwards" this discussion already is. Just look at this social media project:

http://musescore.com/node/562

I don't know where the original recording came from, but the score and "harmonic reduction video" were crowdsourced...

Can't wait to see how musescore will evolve...

Rolf