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:

http://dc.watch.impress.co.jp/docs/news/20120329_522391.html

or skip that and go straight to the maker page:

http://www.epson.jp/osirase/2012/120329.htm

Sorry, they're in Japanese so you'll have to google translate it if you want to learn more.

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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.
Ricoh GR-D
Sony DSC-V3 (used for IR)