Well, there is a way around the server load issue . . . but it brings up its own issue.
If a person has access to their own server, they could stream music from that server via the appropriate HTML in the Clan MotD. (See my myspace page for an example).
In that scenario, each clan would be able to have their own, personalized music.
Now, HTML is currently disabled in the Clan MotD for good reasons - so that pretty much nukes that option right off the bat.
In addition, it could potentially open up copyright issues - another headache.