Hi There,
After struggling with CEC adapters and various LIRC configurations, I bought a FLIRC for my parents to use with their MythTV setup.
Set up is a Mythbuntu HTPC, Logitech Harmony One, FLIRC, TV etc etc
I live overseas, so I sent them instructions on what to do (and set up the Harmony profile online for them so they just had to update it).
I used the Computer > HTPC > FLIRC > XBMC Harmony Profile, and mapped things that MythTV doesn't use (like switching zoom level, switching subtitles etc) for some more MythTV like functions (PIP, PIP control/swap, aspect ratio