According to our sources Olympus is already working on two new MicroFourThirds cameras. The first camera to be released should be a PEN and the second camera should be the long awaited very high-end MicroFourThirds model. Both will be announced within the year. The High-End model will arrive later (and Photokina fits perfectly for such a camera announcement).
According to our sources also new prime lenses should come by late 2010. Probably the 50mm (f/2.0 ?) lens will be the first of the series.
One more thing about Panasonic. We are certain Panasonic will launch the GH2 on Photokina but we have no information about the GF2. One new source told us that Panasonic is planning to release the GF2 months after Photokina. But this is a unreliable rumor. I hope one of my trusted sources can tell me more :)