The US company Birger will soon release a new Canon EOS to Micro Four Thrids adpater that allows aperture control! According to Barry Green (Dvxuser) we should get more news in a couple of weeks and the price should be something like $700. There is no information yet if it will also allow to use the autofocus. If the answer is yes than dear Canon-friends, you can join to Micro Four Thirds using all your lens gear! You will be able to use IS lenses like the 24-105mm f/4 and ultrafast primes like the Canon 50mm f/1.2 on Micro Four Thirds cameras.
Currently you can use manual EOS to M43 adpaters only. There are plenty of them on eBay and they cost between $15 and $70 (Click here to see current auctions).
P.S:: Birger already made a EOS to PL-mount adapter which has built-in wireless control and full AF and aperture control!