This could well be a mythtv development issue but it could be helpful to add to the HDhomeRun setup scripts lmce already employs. This particular TV tuner does appear to be one of the more popular in use by lmce users.http://www.silicondust.com/support/channels/
I am a supporter of datadirect's service, but the difference between cheap and free at times is pretty noteworthy. I can probably do 90% of the work on making this an easily selectable option in mythtv setup if someone is able to oversee and provide the assistance with the other 10%.
There are other free guide data sources I have used such as iTV for iOS that with more work could be brought in as well but as the protocols add up in number I would need more assistance. So if there are other aspiring developers out there looking for a project and like this idea, respond.