Ubuntu 8.10 has Samba 3.2, which does sharing over IPv6.
So Arjan and I tested it: start file manager Nautilus, right-click the directory you want to share and ... that's it.
You can now connect using "smbclient \\\\sand-bla.blaburg.net\\grabbelton" or a browser, like Konqueror (see screendump) or Nautilus (Connect to Server, or smb://sand-bla.blaburg.net/grabbelton/)
As we haven't got any Windows, we can't test Windows' ability to use this IPv6-only share.
