BREWERS ROTATION
According to an article on Brewers.mlb.com, Doug Melvin has said that Matt Kinney, Doug Davis and Ben Sheets are "the top three guys at this point." That leaves Ben Ford, Adrian Hernandez, Wayne Franklin, Chris Capuano and Wes Obermueller fighting for the final two spots.

My gut feeling is that Obermueller will fill one of the two final spots in the rotation, leaving Ben Ford, A Hernandez, Franklin and Capuano fighting for that last spot.

Time to fill people (or just myself) with optimism...
Sheets had an ERA of 4.45 last season, but an ERA Component (thanks to the Bill James 2004 Handbook) of 3.83. Meaning that bad luck may have contributed to his ERA being higher than it should have been.
Davis, despite being an incredibly soft-tossing lefty, dazzled teams once he came to Milwaukee and has had a tremendous spring. Usually soft-tossing lefties get hammered in the big leagues, but there are exceptions (Jamie Moyer, for one).
Kinney pitched pretty well last season, although struggled with control at times. His September was awful, and that ended up making his season look worse than it was.
Obermueller's last start of the season vs. Houston (when Houston still had hopes of making the playoffs) was his best of 2003. Again, his season stats were skewed by a few bad starts.