This has since been replaced by the excellent D300s. Here's what we had to say about the original D300 when it was released in September 2007:
Nikon's D300 is meant to be a more affordable, more approachable version of its superlative D3 digital SLR, but that doesn't mean it's not a great camera in its own right. Like its big brother, the D300 supports "Live View," meaning users can preview and set-up their shots on the LCD display rather than through the viewfinder, a feature which has been rare on dSLRs until recently. Nikon's reputation for outstanding SLRs looks to be safe with the D300, and those looking to get involved with high-end or professional photography should pay special attention to this camera.