.....l listen to their customers and if they demand prime lenses, they will oblige.....
It is nice that Olympus customers will have their attention BUT I think it is the wrong way about marketing the new system.
For the Canon EOS system, the selling point was the technology and availability of a wide range of lenses; more specifically very fast AF, USM, new optics, and later on IS. Remember, Canon's introduction of the EOS system meant that they were leaving many FD photographers behind and had to convince an entire market base that moving on to the EF system was worth the investment. At least for the higher end SLR market, people bought into a system with glass leading the way. They need to build a system of micro 4/3rds and sell the "system". If they plan on building and marketing a camera body + kit lens with the hope that it will drive a future system of lenses only after they hear back from customers, I think they will have a very difficult time and (being honest) they deserve to flop. It sends out a message that Olympus is not 100% dedicated to the new format.
On the other hand, this is a strange place they are carving out in the market. It is neither targeted towards the high end prosumer ("system buyers") nor the low end consumer ("camera buyers") market. Kinda someone looking for a little of both. It is a small market which only really has the Canon G10, Nikon P6000, Panasonic LX3, and the Panasonic G1. So no one really knows how the market will react.
Reading through the dpreview preview, the reservations I have is the display and AF system. They mentioned that Panasonic developed a new AF system that improved speed noticeably. This technology is only on the G1/G1H and not available on the E-P1. The panasonic also incorporates an eye-level viewfinder (electronic) and the E-P1 only has the main LCD liveview which dpreview did mention was a little disappointing (low res). For someone like me who intends on using the camera with legacy manual focus lenses, these lacking features are not desirable. I can't see myself manually focusing while holding a camera at arms length on a lower rez LCD screen.
Definitely will have to see what people say once they hit the market. Either way, I think it is a sharp product. If the AF/LCD live view screen continues to be an issue, I will probably jump on a used Panasonic G1 for 2/3rds the price.