Generate Custom Smart Playlists/Or Sorting using Echonest?

[michaelsonline]

Is there any chance of adding echonest to subsonic for generating smart specific playlists?
Or really specific sorting options?

http://the.echonest.com/platform/
http://the.echonest.com/platform/how-it-works/

Their blog has examples of how deep the sorting can be:
http://blog.echonest.com/

Example applications that use it at:
http://the.echonest.com/platform/showcase/

As far as I know its free for developers to use.

Thanks
Michael