Actually I think the market prospects for an EOS to mFT adapter would be quite good. Going by the numbers the 50 million EOS lenses (
http://www.dpreview.com/news/1001/10012901canon50mef.asp) is somewhat stronger in potential than the 4/3rds to micro adapter device which already exists. I see a lot of Canon users out there either contemplating or using micro cameras, so whether the device works for them or not I feel they are still likely to try it. Add to that, the utility of some EOS lenses might be quite worthwhile on their own, consider the 100-400 just for one. Thats 200-800mm EFL for $2300 with adapter.
I think the whole field of conversions is interesting in itself. Previously looked at Contax N to EOS (I already run a Distagon 18/4 on FF), then there were EOS to Sigma SA which were only ever tackled at an amateur level, and which apparently meets 3 requirements,
* the physicality of differences in the mount
* the differences in voltages
* simple re-routing of the wiring to different pinouts between bodies and lenses.
As an item I accept that Birgers adapter is way too expensive, for it is not intrinsically all that more difficult to
manufacture than say a 4/3rds to mFT adapter, the hard part is sorting out the wiring and voltages which is a research project that could take a month or so to engineer. However for those that spot the utility of such a device I guess having it confirmed as being within the art of the possible is warming. If one firm can do it, so can another and another.
Where after all no system offers a perfect set of choices, adapters conquer a hurdle for users who may feel locked into one particular system. In the changeable world of an individual photographers growth in the challenging world of photography, having a capacity for hardware choice is no a bad thing, its a good thing.
I'm all for it, and I say bring it on.