Keep reading stories about how ipv4 is just about out of addresses and how we need to start moving to ipv6
What kind of hardware is out there and what features desirable for SMB and or home use?
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DD-WRT offers IPv6 support, and works on a variety of hardware that wasn't originally designed for it.
One thing you will find a problem with is that there is a distinct lack of IPv6 sites out there, and few ISPs route IPv6 traffic, so you can't use end-to-end IPv6. However, in order to simulate it within your own network, use 6to4. It will act like you're using IPv6 (all your network computers will think they're using it), but it will actually be on IPv4 over the network. Once IPv6 is supported by ISPs and websites, then the switch is easy! DD-WRT offers support for end-to-end and 6to4.
There are some answers (from the ISP's point of view) over on serverfault but the basic answer seems to be that IPv6 support in a SoHo router is still very unusual, but you can try:
If you're prepared to pay about five times as much, then the Cisco 887W (or 886W if you're in an Annex B country like Germany) will definitely work.
There is also the alternative of something like a Draytek Vigor 120, which is a pure modem and then setting up a PPPoE connection from a computer. You could use one of the many router/firewall Linux distros with the modem and then have a switch and an AP.
Effectively, that would divide up the five components of the standard home router into four pieces (DSL modem - firewall/router - ethernet switch - wireless access point).