If you look in Excel Sports they have a line of Ti bikes called Macalu. There are both MTB and road models. Then you have the Zion line of bikes put out by Jenson. Both of these lines I believe are made in Chattanooga by Litespeed.
I have an Indendant Fabrication Ti MTB. The differance between aluminum and Ti is amazing. They really soak up a lot of the vibrations which is transmitted through an aluminum frame.