The latest software of Teamspeak is out now: TeamSpeak3 Open Beta started.
The versions are named beta2 and the offer 3D sound support and better chat functionalities.
There is a free test-version TS3 SDK available, too. It is limited to one virtual server and 32 slots.
If you want to have a look at it, you can download the new version here:
For further information about all that, visit the teamspeak forum: http://forum.teamspeak.com/