Late last year people were predicting the worldwide supply of IPv4 Internet addresses would run out as early as June this year. Since then, we've seen the number of routers compatible with IPv6 gradually increase in number.
The latest is the Billion BiPAC 7800N and 7800NL ADSL2+ routers, which Internode today announced is available to its customers. As well as being IPV6 ready, both routers are officially supported by the IPS for use with the FetchTV Internet video service.
At $199 and $159 for the Billion BiPAC 7800N and 7800NL, the two routers are by no means the cheapest on the market. But the four-port routers have some advantages over some cheaper routers, including 802.11n wireless, FetchTV compatibility and Gigabit Ethernet in the 7800N. [Update: this paragraph has been corrected. The original version incorrectly listed the 7800NL having Gigabit Ethernet].
Internode is also pushing future compatibility with the National Broadband Network - the press announcement states that Ethernet WAN connectivity means Billion BiPAC 7800NL won't need to get a new router to connect to the NBN.
iiNet also recently announced future compatibility for the NBN and IPv6 with its new BOB2 modem router.
Internode is currently letting ADSL customers access the Internet via IPv6, though there are certain limitations for broadband users connecting this way - such as no unmetered content (something the ISP's web site estimates will be offered by the end of 2011).
Internode has previously stated that its $99 NB6Plus4W router can run firmware that works with IPv4 and IPv6.