Some IPv6 resources.
- Excellent IPv6 overview at Ars Technica. It's written by the author of the book Running IPv6.
- I asked the Untangle people about their IPv6 plans on 2007/04/07
- Vyattais a router/firewall distro that supports IPv6
- Miredo is an OSS implementation of the MS Terdo. Could be the answer to going all IPv6 on a home net?
- This report is generated from a daily script; it predicts when we will run out of IPv4 addresses. Scary!
- Just a few waysthat current software has problems with IPv6
- IPv6 transition mechanisms matrix
It seems to me that the sensible migration plan requires internal changeover to IPv6, with translation to IPv4 (when necessary) at the edge of the intranet - where the internet link(s) occur. The idea here is to make one's LAN completely IPv6, while still able to talk to off-LAN devices that require IPv4 (most of the internet).

... but this seems not to be something anyoneelse is proposing - at least not as far as I can find after quite a bit of googling. So for the best list of transition strategies/technologies I have found is a Microsft paper: IPv6 Transition Technologies. I will try to simplify the technologies listed there.
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Dual stack
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Tunnelling
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ISATAP
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6to4
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Teredo
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Port Proxy
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6over4