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Our servers run Ubuntu 10.04 LTS, which ships with Samba 3.4.7, and this has proper IPv6 support. There is no global switch to make it listen to a specific IP version, but is not too difficult to make it listen to IPV6 IPv6 only.
You need to tell it to only bind to a specific (hard coded) interface address in smb.conf:
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This machine is a server but sits in the Office network, so it was needed to disable autoconfiguration to prevent is from accumulating multiple IPv6 addresses (which is not never a good idea for a serverservers).
Contrary to what you would expect, setting /proc/sys/net/ipv6/conf/eth0/autoconf to 0 does not do the trick. You have to explicitly state the interface. So I ended up with this /etc/network/interfaces:
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December 2011: after successful participation in the Eduroam-as-a-Service from SURFnet/Wentzo wireless, these accesspoints were not needed any more.
I donated them to the System & Network Engineering master education of the University of Amsterdam.
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Can be configured to do IPv6, but only PING works 
Investigate further.
2011-12-20 Reset the cam and started with fresh config, now works fine over IPv6.
Sharp MX-2600N printer
After enabling IPv6 on our Sharp MX2600N printer, the network stack actually works, but only a couple of services are running IPv6:
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