Now, if only my router supported IPv6. Sadly, it doesn't seem to come out of the box on any home-oriented routers.
Off the top of my head all Apple Airport Express/Extreme/Time Capsule routers, DLink 601/655/855, linksys WRT610N/E3000. All support IPv6, most of those let you configure the router as 6to4 or 6in4 (tunnelbroker, etc) tunnel endpoint as well. The DLink ones even support a stateful DHCPv6 server to provide specific v6 address ranges to your LAN clients.
The support on the most recent revisions often isn't just limited to firmware either. The Dlink routers have IPv6 ready logos on the box and instructions for IPv6 features in the manual. You can pick these routers up in your local Best Buy or Office Depot and the v6 support is not limited to the high end ones either.
I am sure there are more than those that I have listed, they are just the ones that I have personally used for home IPv6 stuff.
Note: the way Dlink has done the IPv6 upgrades on the other models is by releasing a new hardware revision. So DIR-615 Rev C,D, and E supports IPv6, but Rev A and B don't. =\
My WRT610N ($160 on amazon) seems to work fine for ipv6.google.com and I have not configured anything.
I would hope all new linksys are similar, but a quick search makes it look like the WRT300N does not support v6.
I can also see ipv6.google.com, but I know my ISP doesn't do IPv6.