Hell no.
We have Saviola, who better start earning his big bucks.
If we were to get Tevez, we'd have to spend a lot of money (which I don't believe we have, and if we do, I don't want to waste another euro) and Saviola, a high earner considering his position in the team, would remain on the bench. We don't know how Tevez would fit in. Besides, I think Eto'o will be back in late February/March, so we'd actually only use Tevez for like two or three months, which is not enough for the money we would spend.
Plus, there's Guddy and Giuly. I think we have enough forwards.
The reason why we're even looking for someone else is that our game relies on Eto'o a lot, and we feel his absence more than we should. If we would just get used to playing with a different kind of striker, and get rid of the rotation policy, we'd be ok and no one would want Tevez.
I admire the small Argentine, I think he's a blast, but he would cost too much and wouldn't be used enough. If one day Tevez would come to Barca, I'd expect him to be the starting striker, which he can't be right now, because Eto'o is untouchable.