Alright. Let me put in my $0.02 into this one since it's pretty well stagnated.
Spike would make a LOT of sense. it has the right target audience, and the demographic fits. It's something more premium of a regular cable network so they may have the budget to really push this. I think they did quite well with "Bull Run" but since i never heard a whisper of a second series coming to primetime (they had some signups and whatnot on their website, but that was it)maybe not. Otherwise, this would make a lot of sense.
USA. They have a better budget. they're not COMPLETE whores to sponsorship unlike fox/nbc, but i guess i could see it going south. they just need a disclaimer like they have on infomercials that read "The content of this programming does not reflect the views of this network or it's subsidaries. Viewer discretion is advised" then if any automotive company NOT awash with debt decides to buy in, they could at least in some way limit the commercial whoring of one particular brand of product, hopefully associating with incidentals like soft drinks, cel phones, boards of tourism for locations, etc.
I personally don't think Adam is still a good "fit" but Ive taken more notice on Tanner's driving and think he should stick around. maybe get someone like Drew Carrey in there? not really a car guy but can be funny in a situation (i guess this leaves me open to taking jabs at my comedic picks, but i digress). Just SOMEONE needs to pick this up because, as mentioned earlier, the US is such a massive car culture that it shouldn't be ignored.