I didn't see anything about this yet, but if i has been mentioned, sorry.
According to MLBtraderumors.com, the Brewers have signed Jeff Weaver http://www.mlbtraderumors.com/2008/04/brewers-sign-je.html
He signed an incentive-laden minor league deal. Wow, Boras is really making his paycheck with some of his clients this year, huh?
If anything, this could be Ben Sheets insurance (in case of injury), but if he regains any of his "old form", he could replace any of the lower arms in the rotation that might slip or become ineffective. I kind of see him as a better Mark Mulder-type option for the Brewers...
Over at Brew Crew Ball they had a fan post discussion about the signing here http://www.brewcrewball.com/2008/4/15/399069/jeff-weaver
Here's hoping he makes a magical trip up sometime in the next 3 days to pitch against us!