I decided to release as open source (MIT license) my collection of Objective-C classes that can parse out the schedule information from ATSC broadcasts. These are just the classes for that narrow purpose and anyone using them will have to make their own TV tuner class to interface with the actual hardware. So, there isn't even an Xcode project included.
If 2 people can actually use this code I will be happily surprised. Regardless, here it is on Github.