Chris Jericho is an out-of-left field choice to host a game show, but I think he can pull it off. He has the enthusiasm and personality to command attention on screen, and he's known as one of the best "promo" guys in wrestling (and one of the few who can ad-lib and get off the script without struggling).
Jericho has wanted to become a mainstream Hollywood type for some time -- even taking a two-year sabbatical from wrestling a few years ago to focus on his acting and music careers -- so he's definitely going to give it his all here. I'll be curious to see if ABC wants to him to present his wrestling persona on-screen, or create a "hybrid" of his wrestling and non-wrestling personalities (i.e. - playing it straight while asking questions, while insulting contestants when they lose).
As for taping, given that only six episodes have been green-lit, I wouldn't be surprised if they tape everything in one or two days. Unless Jericho gets clearance by the WWE to miss RAW (won't happen), a PPV (won't happen) or weekend house shows (more likely), I would expect the show to tape on a Wednesday or Thursday.
JD