That's really great. Sharing not only files, but also resources of your pc (scanners,printers,*******,etc) for "invited" users (give users you meet access to the resources) could make gnutella an ultimative community. Sure, there has to be a security against fakers, which is difficult in p2p. Maybe digital signs may help. or the users have to register to the hostcache servers with an unique nickname and password.

I think everyone should think so: The future of Gnutella is like an unwritten book and we've got the letters to fill it.