DP Review has an interview with Olympus' Toshi Terada, Manager, Product Planning SLR products, where he reveals that a new Olympus Four Thirds camera might be released this year:
"Direction-wise, we'd like to produce products for Four Thirds and Micro Four Thirds within this year. Because we have to provide a product for users with SHG and HG lenses. And there are people using E400, 500 and 600-series DSLRs, we have to provide products for them to keep enjoying their photography."
The Four Thirds standard, created by Olympus and Kodak, was the forerunner of the Micro Four Thirds (MFT) system created by Olympus and Panasonic. The sensor size was similar, but unlike the mirrorless MFT cameras, the Four Thirds cameras retained the mirror-box found in DSLR cameras and weren't much smaller than their APS-C DSLR counterparts.
The latest Four Thirds camera, the Olympus E-5, was released in 2010.
Check out the interview at DP Review for more, including Terada's thoughts on the future of compact cameras and why APS-C compacts just aren't practical.