IPv6 implementations (1)

Layer 2
Nothing tricky, you just need normal switch/hub
Some of ethernet card/driver have problem with multicast
Multicast MUST work properly

Routers (like Cisco)
Many vendors are shipping IPv6 in their firmware
Cisco, Juniper, Hitachi, Fujitsu, NEC, Yamaha, IIJ, Allied-Telesys, Extreme, Foundary...
Dialup servers/DSL devices are behind the schedule