O'Reilly
http://conferences.oreillynet.com/cs/p2pweb2001/pub/w/16/sessions_metada...
Lada Adamic
http://www.hpl.hp.com/shl/people/ladamic/research.html
From Bitzi
http://www.google.it/search?q=cache:oJ9m49mnazQC:bitzi.com/about/metadat...
Robert Mohr
http://xavvy.com/
Brandon Wiley's Weblog
blanu.net/
Over the past several weeks, three Gnutella vendors have released versions of their software featuring "Bitzi Lookup" as an option on local files and some search results.
Shareaza unveiled the feature in their 1.2 release
LimeWire offers the feature in their 2.5.2 public beta
BearShare is testing the feature in their 4.0.1 BearShare Labs beta.
