DxOMark just finished their test on the new Sony NEX5N and not surprisingly, the results are better than the Sony NEX-C3. Sony NEX5N gives better image quality for portrait, landscape and sports photography. Although, i think , the differences are barely noticeable.
Sony NEX5N is now In-stock at Amazon.com , for $700 !

DxOMark just finished their testing and review on Olympus E-P3 to measure its sensor performances. Interesting results ! The E-P3′s score is somewhat lower than its predecessor , E-P2 and E-P1. E-P3′s overall score is 51 while E-P2 and E-P1 are 56 and 55 respectively. According to DxOMark , they believe that E-P3 use the same sensor as its predecessor.

Several interesting comparisons to check for
Order and Stock Status
Olympus E-P3 still not available for pre-order on Amazon but listed on Adorama for $900 ( body + 17mm f/2.8 lens )
DxOMark just tested and reviewed the Sony NEX-C3. DxOMark’s overall score for the camera is 73 , five points better than its predecessor , the Sony NEX3 (68) and Sony NEX5 (69).

And another interesting comparisons:
Sony NEX-C3 vs Nikon DSLRs ( D7000, D3100 )
Sony NEX-C3 vs Canon DSLRs (T3i, 60D)
Sony NEX-C3 vs m43 cameras ( GF2 , PEN E-PL2 )
Sony NEX-C3 vs Fuji X100 ( similar APS-C sensor )
Well, apparently the Sony NEX-C3 has better sensor than Nikon D3100 and Canon DSLRs ( T3, T3i, 60D ) but still below the Nikon D7000 or Sony A580. With Fuji X100, both cameras are on par.