I completed the he.net IPv6 Sage certification in January this year and have just received the T-shirt.
I started the certification programme in 2011 when I upgraded my network infrastructure to properly support IPv6. I did all the way through guru, but was stuck at that point because the name server of my parent domain didn’t support IPv6 yet. In January this year, I re-evaluated my network infrastructure and completed the sage test. All my services are completely reachable from the IPv6 Internet.