Spent Sunday afternoon at Michael Krufky's house making use of his DVB-T generator.
Identified a regression in the HVR-900 driver where the first tune would succeed and then all subsequent tunes would fail:
http://kernellabs.com/hg/~dheitmueller/hvr-900-tuning-fix
Brought online support for the HVR-900 R2, which many people have been clamoring for quite a while:
http://kernellabs.com/hg/~dheitmueller/hvr-900-r2
A pull request for the HR-900 R2 support hasn't been issued because I still have to write a firmware extraction script. But I did confirm that the code works, so this will...