Starting point for a new IPv6 "user"?

[Andrey Roussev]

Hi there,

First of all, please excuse my poor english 
Today I got my first IPv6 address. As I'm interested as a network
programmer, I would like to do a little bit more testing (than just
pinging 2 or 3 hosts I know :). My question is if I could find somewhere
any information about such test services. May be a list of experimental
sites running some sort of experimental services or something... I'm
also interested in taking part of IPv6 projects.

I will appreciate any help. Thanks.