Robin Wong and Ming Thein have each posted their review of the new Olympus 60mm f/2.8 macro. Both Robin and Ming are great photographers who write terrific reviews.
Robin Wong: Olympus M.Zuiko 60mm F2.8 Macro Review: General Shooting
Review: The Olympus ZD 60mm f2.8 Macro and FL-600R wireless flash system
I enjoyed both of these reviews a lot, and while I have decided against buying this lens, these reviews are testing my resolve. If I were in the market for a macro lens, I'd probably buy the Olympus 60 over the Panasonic Leica 45 because of working distance and price. That said, the PL45 is one of my all-time favorite lenses, is more compact, and there is a very special character to the images it creates. Hard to go wrong with either it seems.