I just logged into tunnelbroker.net to check: my HE account has been registered November 22, 2010 11:30:00 UTC. Today it's unused because IPv6 is basically always available in France.
That's not even the first time I tried IPv6 things, part of it being I had some access to RENATER via my engineering school, right when they kicked off IPv6 around 2002.
The past 10 years of IPv6 have been largely uneventful for me: it just works.