> Clustering of only Limewire clients is a technical non-issue and
> unfair against any other client.

Please do read over my posts. Nowhere did I say clustering LimeWire clients together is beneficial to the network. I said clustering Ultrapeers (of which, only LimeWire currently implements) will increase the search horizon while at the same time decreasing bandwidth utilisation.

Don't try to tell me it doesn't, because I use LimeWire and have implemented Ultrapeers in an php-gtk based gnutella simulation/test app I wrote (no it's not going to be public).