If we brought in an outside WR today, there's little to no chance that he'd play on Sunday vs. Cleveland.
It takes quite a bit of time for WR's to learn the offense with all the reads they have to make of the defense that affect their routes mid-play.
Then it takes quite a bit of time to get on the same page with the QB.
Playing a WR who hasn't been with you through training camp is a recipe for disaster in a game, one wrong or premature cut or changed pattern that the QB didn't predict and suddenly you see one of those INT's where everyone wonders who the heck the QB was throwing to.
I feel better going with what we've got. The only trade I'd make would be if a team like Arizona wanted to unload a guy like Boldin, but even then he wouldn't have much of an effect on our offense for a few weeks. Besides, if Arizona had any intention of trading him, they'd have done it in time to use the selections in the draft or to get their new players ready to benefit them.
Don't hold your breath...we're going with the guys we went to camp with.