I run dual strobes on mine. Just one really made a differncebut 2 opened a whole new door. all my uploaded images have been shot with this camera (though i just got a Nikon D90 and am searching housing options).
I carry a white board to set manual whitebalance, crank the aperature to the biggest number the sensor will allow and adjust shutterspeed manually to compensate. usually leave the strobes at max with diffusers on them. one for fill and one for subject.
for macro i set the exposure metering to spot, most of the time center weighted and for wide angle i set it to full frame.
Only real issue is that the camera strobe is taking a long to to recharge so with flash i only get about 2 shots a minute. it is driving me nuts. My memory tells me it was faster when I got it.
Obviously, looking at my shots, i am no pro, but i have really p/o'd alot of guys who could afford DSLR but could not by a clue. Have fun.