I wouldn't mind that either. I wouldn't have minded any veteran coming in at any time. I was hoping they would get one out of the FA pool earlier on.
Rodgers is great, but if there's one thing that really showed in his previous years is how fragile he can be. Ofcourse it could just've been bad luck every time, but why take such a big risk by not signing a veteran back-up?
I just hope Flynn is doing crazy good or something in practice and/or they're seeing something we haven't seen yet.
Edit : I wouldn't mind Harrington either. For some weird reason I liked him ever since he joined the league. I think he will be a pretty good back-up. Look at his stats playing in the craphole called Atlanta, he did alright.
Also, he's only been on cupcake teams his entire career. He's a bit like the 'screw-up' for the league. Can't find a QB to play for your horrible team? Just get Harrington.