The templates are user selectable. To test it out or to change your theme please go to your Profile and then about two thrirds of the way do you can select a different profile.
Try out the DBB_Green this is a template I;ve been working on for the past few weeks.
Many users are already using each of the themes, the only ones I have been able to focus any time on are the DescentBB and DBB_Green themes. As time permits I will work on addressing issues with each, IF you are using a theme and find an issue with it PLEASE start a thread in the Feedback forum and be sure to include the theme name you are using in the subject.
Currently the TeamSpeak Mod isn't viewable in the SubIce and the BBTech themes.
Happy New Year!
KoolBear