LimeWire has released the beta version of our supernode implementation,
available at:

http://www.limewire.com/index.jsp/download_beta

In our preliminary results, client nodes receive almost no traffic over
their single, supernode connection, while supernodes are not adversely
affected by the increase in connections. The supernodes and clients also
use query routing.

If people have trouble connecting, you can try connecting directly to
216.27.158.74 on port 6357. We encourage anyone who would like to connect
to give it a try. Unfortunatley, only LimeWires can currently connect to
supernodes or become supernodes themselves (due to query routing, switching
between client/supernode
state, etc). The implementation is, as always, available from our CVS. The
branch is called supernode-branch. Credit for the supernode implementation
goes to Anurag Singla.