Olympus PEN Lite E-PL3: What lenses to use with my camera?!

I traded in my Canon 450D and got an Olympus E-PL3 simply for the fact that I though my DSLR was too heavy for regular use. I love the E-PL3 but I'm only using one lens at the moment. Obviously I know that the camera uses m.zuiko lenses but what other brands of lenses work with the camera?

Are there any specific lenses that people would recommend? I am looking for a pancake lens and a decent length telephoto lens. I'm not sure but don't some of the panasonic lenses work this camera too?

Olympus-e-pl3_medium

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