No, we here at TV Squad haven't suddenly lost our minds. '24' is indeed on Fox, not NBC, but there's a possibility that the show could change networks if FOX decides that this is the last season of the drama, and NBC execs have talked about picking it up.
That's one of the topics talked about in The Live Feed's interview with NBC head programmer Angela Bromstad. It's unlikely that the show would come over to NBC because it's much too expensive, but Bromstead isn't completely ruling it out because it's something that has been talked about. As for other NBC shows, the network is very happy with the way 'Chuck' is performing and the same is true about 'Community,' though neither of those shows have been guaranteed another season.
As for that other show that people wonder whether or not is coming back, 'Heroes,' Bromstad says she met with creator Tim Kring last week and they talked over some things, but there's no word yet on whether that show will come back for another (probably final?) season.