i started with the c5050z and though i'm fully canon now (40D, lots of lenses and G9) some of my best shots were with the oly. best thing is the colour signature of oly - bright blues great for sky and punchy nature shots.
It's a bit OT, but I bought the 850SW at the recent IT Show. Pix quality is nothing to shout about, as expected from a P&S, but the build quality does inspire confidence that dropping it or getting it wet will not put the camera out of commission immediately.
A great, hardy little camera to bring on a leisure trip. In a nutshell, it serves its purpose well, but do not expect it to compete with a DSLR, that'll be very unrealistic.