Just got to try the Olympus version. If I was really in a pickle for the reach the 45-200 would provide, I already have the Olympus 70-300 4/3rd's lens and the MMF-2 adapter. I also already have the 4/3rd's 9-18 too but dang, the micro version is so much smaller I'm gonna get that one too pretty soon.
I'm also contemplating what I really want/need to keep after assembling this initial all-micro outfit. I could divest myself of a lot of stuff and create a pretty sizeable fund to be used for anything upcoming this next year that looks good. Starting to really like the (much) smaller bag needed for my E-PL1 outfit!