Who is IIJ, what kind of IPv6 services offered?

One of the very first commercial ISPs in Japan
(and probably one of the biggest)
Operational since 1992, IPv6 since 1998

Connectivity services
2001:240::/32, 3ffe:8020::/28
IPv6 tunnel service - since 1999
IPv6-only leased line service - since 2000
IPv4/v6 dual stack leased line service - since 2001
Commercial service, not experimental
Other services
Web server hosting, with IPv4/v6 dual stack support
Data center with IPv6 connectivity
IPv4/v6 router "SEIL"
Consultation - help people design IPv6 network
Participate/contribute to KAME, IETF and others
KAME: IPv6 stack for BSDs (*BSD, MacOSX, and routers)