A quick update , CNET has made Nikon D3100 review available online. Not an in-depth profesional review but worth to check for. The review also compare to other similar camera :
Canon EOS Xsi, Canon EOS T1i, Pentax K-x and Sony A-500.
Nikon D3100 got a 3.5 out of 5 star
The good: Excellent photo quality; well-laid-out controls; interesting, user-friendly Guide mode; full manual controls in video capture. Excellent photo quality; well-laid-out controls; interesting, user-friendly Guide mode; full manual controls in video capture.
The bad: Smallish viewfinder; slower than the competition; no bracketing. Smallish viewfinder; slower than the competition; no bracketing.
The bottom line: A very good entry-level dSLR, the Nikon D3100 delivers excellent photo quality in a body that’s streamlined for experienced photographers, but relatively unintimidating for the less advanced. Its only weakness is performance; though solid, it nevertheless lags behind the competition. A very good entry-level dSLR, the Nikon D3100 delivers excellent photo quality in a body that’s streamlined for experienced photographers, but relatively unintimidating for the less advanced. Its only weakness is performance; though solid, it nevertheless lags behind the competition.
Check the review here