Travel Channel HD follows the road to Comcast's Jacksonville, FL system
We assumed that the solo addition in Houston was an anomaly, but it seems that Comcast may be pushing these stragglers in more locales than that. Out of nowhere, the carrier has added Travel Channel HD in Jacksonville, Florida, a followup of sorts to the two it added just weeks ago. Moral of the story? If you're a Comcast user, be on the lookout for one or two here and there, you just might get lucky.
[Thanks, Matthew]