I haven't seen this mentioned, but after KaZaa stopped allowing it's client to be downloaded, the size of the Gnutella network seems to have quadrupled overnight:

http://www.limewire.com/historical_size.html

I've certainly noticed the increased response to queries in the past few days. I was wondering if FastTrack shutting down would increase Gnutella traffic like the Napster shut down helped Gnutella traffic. Apparently this is the case - from the chart it appears Gnutella has been losing share to FastTrack, which wrote superior p2p technology (swarming, Ultrapeering) before Gnutella. It seems that if FastTrack gets shut down, Gnutella will be getting back most of the people who switched and then some.

I myself use Morpheus as often as I use Gnutella. Hopefully, we can get the Gnutella network to the functionality of Morpheus (ultrapeering, swarming, searching by file type) as soon as possible.