I mostly shoot with a Canon 7D and most of my images are taken with the Canon 17-55mm f/2.8 IS lens (pictured on the 7D). The other lenses I use for different situations (macro, low light, etc.).
I also have an Olympus E-P3 which I use when I don’t want to carry a bulky SLR around. It’s an excellent little camera.
I also use my iPhone 4S for more casual photos and snapshots.
My Cameras and Gear:
Canon 270 EX II flash
Canon 50mm f/1.4 lens
Canon 100mm f/2.8 L IS Macro lens
Canon 10-22mm f/3.5-4.5 lens
Canon 17-55mm f/2.8 IS lens
Tamron 70-300mm f/4-5.6 VC lens
Olympus 14-42mm f/3.5-5.6 lens
Olympus 40-150mm f/4.0-5.6 lens