Wicked Dark: Are you referring to the E-620? I'm a bit disappointed in how dim the viewfinders are it seems to be a design limitation of the system. Hopefully Olympus is working on something to improve the situation.

AcadieLibre: Which viewfinder extender do you use? Does it magnify and or crop the viewfinder image? I've been browsing the B&H catalog and I see that they make magnifying eyepieces and negative and positive diopters for Nikon and Canon cameras, but I haven't found any for Olympus cameras or the other brands.

I found the Xtend-a-View which is basically a Hoodman for the LCD screen. Not sure using live view is a good idea for wildlife photos though. Hoodman also makes the HoodEYE which might be the viewfinder extender you referred to, but it's only for Nikons and high end Canons.