If you're interested in who makes the OM-D EVF
If you're interested in who makes the OM-D EVF, the answer has popped up on the Japanese "DCWatch" site:
or skip that and go straight to the maker page:
Sorry, they're in Japanese so you'll have to google translate it if you want to learn more.
Canon 5D Mark II, 24-105mm L, 70-200mm f/4L IS, EF, 100mm f2, Tokina 16-28mm f2.8.
Olympus E-PL3, 14-42mm II, 17mm, 45mm f1.8.
Sony DSC-V3 (used for IR)