oh dude i am so glad i found this topic. im working on a gnutella client in VB.NET too. I'm working on an open source gnutella framework in vb.net and a client that uses the framework.
I was wondering if you wanna start like a joint venture thing?
id be awesome if we could share our resources.
So far all ive got is 2 classes "GSocket" and "GCacheBuilder"
GSocket basically handles all your gnutella communication, extracts payloads from messages and triggers events accordingly
eg. onPing, onPong, onConnected etc... (onConnected fires after a sucessfull handshake)

GCacheBuilder has several methods that add servants to a collection that you provide

eg. public sub BuildFromURL(byval GHOSTURL as string, byref hostCollection as collection)

public sub BuildFromFile(byval FileName as string, byref hostCollection)
blah blah blah
newayz, if you want we could work together?
I have a website www.poisonvibes.com its not complete but I could use it for our use? for uploading material documents, source code, what'ever
newayz, email me @ israfil334@hotmail.com if ur interested