Right now apparently only at a few Spec's (Walnut Hill and Hulen), but expect to see it lots of places soon. Mosaic IPA, Witbeer, and Vienna Lager. Plus the Trinity Tripel and Inspiration Ale bombers.
I talked to them for a little while at GABF, I think it was only DFW (for now) and Midtown Houston Spec's, but I could be wrong on either of those, it was towards the end of the session