From a DPReview interview with Akira Watanabe, product planning manager of Olympus's SLR division at the E-P1 launch event in Berlin:
"When we launched Four Thirds we created a roadmap in response to calls from the market, we arranged them into a series of priorities and started to create those lenses. In Spring, we will launch at least a wide zoom or a high magnification zoom after that we will listen to voices from the market. If customers request prime lenses first, they'll be first on our priorities list."Sounds suspiciously like the business-as-usual Olympus lens development philosophy: zooms, zooms, and more zooms, plus a token prime or two (but only if it's a leap year, all the planets align, and the zoom-obsessed Olympus user base suddenly starts requesting prime lenses).
These primes could follow the compact, 'pancake' design of the 17mm lens launched today: "this is our second pancake lens, following the 25mm F2.8 Four Thirds lens. The 25mm was very well accepted - better than we expected, so we will follow customer requests."