This is a screencap of tvtime with the analog tuner:
Now, you might be saying, "Wow that looks like crap!" but bear in mind that is just a first cut, and obviously I will get it working correctly. But the fact that I can see a picture at all is a milestone.
ATI dropped a 16MB zip file on me last night with full documentation and reference driver source for the ATI316, so I can now start working on the digital demodulator. And Maxlinear got back to me today and provided me the mxl5005s datasheet and register map, so I should be able to debug the issues necessary for the analog support.
All in all, a good day.