Well...NBC has cut back that order and will suspend production after the 17th episode has completed filming.
Though the show hasn't been canceled, this also doesn't bode well for a second season. It's future will depend on the performance of the remaining episodes that air. The last episode will air on February 25, 2009.
The show has also undergone a variety of cast changes and revamps over the course of the season thus far.
So...who would be upset if Knight Rider goes away?