First thing to consider is that even though they definitely flashed it in week one, the Jags' run defense is anything but crappy. They aren't quite as good as Baltimore but are one of the best run-stopping teams in the league. One bad week does not knock them down any.
If Thomas Jones is expected to get the majority of the runs, I'd go with him. If he is not, go with Norwood. I doubt you get many fantasy points from either though.