In addition to Nikon D300S, one more DSLR camera with guide mode, was announced by Nikon. It’s Nikon D3000. Compare to D300S, it has less features but it’s an ideal choice for people looking to upgrade from point-and-shoot camera to digital SLR. It’s a pretty solid DSLR for $600, with a 10.2 MP sensor, a 230k pixel screen, 11-point autofocus system, a new Guide Mode, and an 18-55 NIKKOR VR lens.
Let’s have a quick look on it’s features:

New Guide mode provides in-camera assistance for doing camera settings and shooting …

Nikon Corporation , Tokyo, today introduced its new DX-format digital SLR flagship, the Nikon D300S . Inheriting the finest features of highly acclaimed D300, the D300S posses many innovative enhancements and is designed to meet an even broader scope of creative demands from serious photographers.
Let’s have a brief look on their features:

Rapid 7 fps with included rechargeable Li-ion Battery EN-EL3e, and 8 fps optional Multi-Power Battery Pack MB-D10 and rechargeable EN-EL4 battery continuous shooting.
Refined D-Movie function with an external microphone input for clear stereo sound recordings.
Multi-CAM 51 AF points …

The Olympus E-620 DSLR fits snugly between the E-30 and the recently announced E-450, in the middle of the Olympus ‘E’ range.
All three cameras incorporate the Four Thirds system – which is almost six years old now, and remains unique as the only DSLR system that was designed from the ground up for digital imaging.
Other manufacturers, like Canon, Nikon and Pentax, just adapted their film-based cameras and lenses to take digital pictures, but Olympus, and other members of the Four Thirds consortium like Panasonic, decided to wipe the slate clean …