Last night, I started writing a saa7136 driver for the Pinnacle Ultimate 808e. Used the cx25840 driver as a template, and got i2c working properly and am able to perform both i2c reads and writes to registers (successfully read the chip's version info). Next I will get the composite interface working (Pinnacle provided the analog pin mappings for the various interfaces on Friday).
Also sent test patches to users for the ADS Instant TV USB 704 and the Pinnacle PCTV USB (DVB-T). Will hopefully find out in the next couple of days what is still required for those devices based on their testing.