Hi!
Just saying hello here, I'll probably be floating around here asking strange questions about Gnutella. Many years ago, I was the lead engineer on this:

http://www.cooperatingsystems.com/

and we're looking at updating it a little (yes, Gnutella 0.4 is a bit outdated now...). So I'll be trying to get back up to speed with Gnutella, and hacking away at HelloWorld to try to make it play nicely with Gnutella-0.6-world!

Mike.