I just Googled for carbon tubeless a couple nights ago. Some links for Rol wheels came up, with hopes they'd have them in 2011. But they're not listed on their website. There was also another hopeful one...for later.

From what I remember reading about them, the issue is rim deformation under hard braking (on long descents). The carbon rim deforms, then the rim/tire seal goes all to heck. Velo magazine recently mentioned someone designing a road tubeless wheel with disc brakes. Later this summer, I think. It was not more than two issues ago, and perhaps in the most recent bikes and gear issue.