Good move for them, losing Vasicek (who was on the 3rd line behind Staal and Brind'Amour and by the way) won't hurt Carolina too much. Not saying he won't be a very good player down the road, but he wasn't needed much on their roster. Adding in Walker to their line-up will yet again give them a very balanced offence, pretty close to the one that they had last season.
Not too far off at all, and tough to stop yet again.
They look to be havign a pretty good team next season... at least, offencively.
I'm not sure about the move from Nashville's side of things though. I know that they have Sullivan, Kariya, and Hartnell on the wings. I guess they think it's time to move Erat up to 2nd line duties, or they're thinking of Legwand being moved to the right?
Now that I think about it, Legwand could be on the move in a trade actually. Pure speculation on my part, but it's possible.