IPv6 Tunnel Brokers?
thedillybar asks: "I have noticed the appearance of many IPv6 Tunnel Brokers which allow anyone to sign-up and tunnel IPv6 over their current IPv4 connection.
Hurricane Electric and BT Exact both offer tunnels here and here, respectively. For those of you using a tunnel like this, what do you think of their reliability and use as a development tool?"
I've been using freenet6 for a bout a year now. I've never had any problems with it, and I get a /48 for free, so I've been able to experiment with IPv6 on various machines on my network (FreeBSD, Linux, Solaris, AIX, and XP).
I haven't written any IPv6 apps yet -- still need to read/buy a good programming guide.