Well.. i'm curious too see how the last season will play out. A 24 style approach would have been cool except for possible continuity purposes if they indeed meet for the first time after the wedding has concluded. That would indeed be a kick in the face if they spend the entire season with them prancing around and never actually meeting.
Interestingly enough, it's been done (and was cancelled): Big Day
on ABC in 2006, starring Marla Sokoloff. It was spectacularly terrible.
I'd think Thomas and Bays would be able to do a better job with the concept.