The Brewers are likely to shop Fielder around a bit this summer, especially if they're out of the race, which I suspect they will be. Having a year and a half still on his contract makes him that much more valuable and Milwaukee has to know that if they're going to trade him, they have to get a solid haul back in return.
Personally, I'd rather we go after Adam Dunn, who's a cheaper alternative and could solve our issues short term, but if the price was right on Fielder, you bet your bippy I'd pull the trigger on that deal. Having him in our lineup as DH would be huge IMO.