Now that TS3 Server and the Beta Clients Support IPv6 when is the site going to allow using of a hostname instead of only an IPv4 literal address for the join links and such.

With a hostname if said hostname has IPv6 and IPv4 setup, clients will prefer IPv6 as they should when they have IPv6, and use IPv4 when they dont.

Right now since the site only provides the IPv4 literal, they cannot.

And eventually the site should be able to query TS3 servers via IPv6.

No plans, but you're welcome to add your interest in the idea thread for IPv6:

http://www.gametracker.com/forums/forum.php?site=1&thread=78010