I opted out of the SmartRG rental and connected a repurposed device running OpenWrt instead. I configured 6RD the same as I once did for Fusion ADSL, and I got IPv6 connectivity right away. However, instead of a gigabit, a speed test showed around ten megabits for download and a hundred for upload, so I turned off IPv6 and went back to a gigabit. I guess we just have to wait until it's announced.