If that's the asking price, I'd be strongly compelled to take it. Only thing is, if we lose Helm for another Center, while we upgrade the position we don't solve our current dilemma of not having enough good centers healthy.
I agree with Holland about no rentals, but he should absolutely be aggressive about anyone else. I'd part with picks easily, since the draft will be weak and the Wings will finish somewhere in the middle of the pack. We have a lot of prospects, so if one of them gets us a legit top 6 or top 4 guy right now, you do it.
The injuries to Datsyuk and Z only make it more imperative that we make a move, not less. Even with everyone healthy, the team still needs changes and additions. So make them now, since there are some legitimately good choices available. This year's deadline is better than previous ones because there are actually good players available, so don't wait for the off-season to upgrade somewhere.
And as for Cammalleri, he may be small, but he gets to the dirty areas, doesn't he? And he snipes. I think he's like Tatar. Small but he plays big.