“As successor to the E-P2, there are clearly a number of improvements visible, such as a very fast autofocus in the Olympus PEN E-P3, a more powerful processor, a new touch display with a larger viewing angle and a built-in flash has been added.”
LetsGoDigital has published their review of the Olympus E-P3, a Digital Interchangeable Lens Compact System Camera with 12.3MP resolution (on a 17.3 x 13.0 mm High Speed Live MOS Sensor), Sensor-shift Image Stabilization, Dust Reduction, an extra large 3.0-in. LCD (614k-dot), Full HD Movie (1920×1080/60i) with stereo sound, Intelligent AUTO (auto scene recognition), Scene Modes, AF Tracking, Face Detection, Shadow Adjustment Technology, PASM modes, Shutter speed range of 60 – 1/4000 sec. plus Bulb (up to 30 mins), Continuous Shooting at 5.5fps, RAW file format, Digital Level, MF Assist, a hot shoe, Live View Autofocus system with real time focus, Multiple Exposure, Wireless compatibility (using optional PP-1 Penpal or Eye-Fi card), and Art Filters.
You can read the Olympus E-P3 Review @ LetsGoDigital.