Stan she shoots products and landscapes.
I think its a middle of the range Olympus about 3yrs old. I know its 2 x crop and it does take a decent photo.
Hey Stu, I would think if she doesn't have a lot invested in UHG Olympus glass, it would be a pretty easy switch to at least the 5D MkII. Not to throw a monkey wrench in this, but there are some great deals on 1Ds MkIII's out there which gives her better weather sealing for being out in the wild, a slight increase in dynamic range, better focus and dual cards slots. If she's not so worried about the weather sealing than either of the last two iterations of the 5D. One thing that could also push her over the edge is the ability to use the Canon tilt-shift lenses for both product and landscapes. Hey, it's only money, right?
As far as Olympus stuff, just know that my wife still shoots with an old E-500 8mpx and the kit lens for our travels in Italy & France and the files print up beautifully as 30x40's. I'm even thinking of adding one of the OM-D EM-5's with a couple of lenses for travel.