Don't panic!
Following this theory, we have to keep existing clients bad, because good clients are attacked by RIA? No, I say improve the protocoll and make all clients equal good.
Also this debate mixed protocolls (Napster/Fasttrack) with single gnutella clients. In the view of RIAA breaking down a centralized technology (Napster/Fasttrack are according to RIAAs internal papers) is possible - and makes one step forward in controlling music business/money flow. But breaking down one single gnutella client of many others does result in no advantage for RIAA at all. Gnutella can't be controlled as far as we know yet. Gnutella's strength is the decentral topology, open protocoll (!) and a resulting variety of clients.
So keep in mind metadata is not music only. It's only one aspect of gnutella's protocoll enhancement. Don't be afraid of developing the Gnutella protocoll.
Moak