Leica M-system action at Photozone.de where they evaluate the Leica Summicron-M 35mm f2 ASPH M-mount lens! Prime time indeed! Since Leica makes no APS-C iLCs, they only post 35mm full frame reviews of these. Unlike SLR lenses that get their 35mm and APS-C reviews.
The co-branded Panasonic-Leica 45mm f2.8 OIS macro Micro Four Thirds lens has been reviewed in a detailed review at Lens Tip. Conclusions and samples taken with the Olympus E-PL1 can be found on the last page of the review.