Really good lens? Really good CCD? It might be better than your run of the mill Blackberry, but it's not that great.
Specifications aren't everything, but the iPhone CCD is a 5 MP panel that's 1/3.2" diagonal. Not to look far, the Nokia N8 has an 12 MP CCD at 1/1.83" (resolution too high, but hard to argue with the sensor size). Point and shoot standalone cameras are normally around 1/2.5"; 1/1.7" is considered high end (Canon S95/G12 etc).
The iPhone lens is 3.85 mm f/2.8; the N8 is 5.4mm f/2.8; the wide end of the S95 is 6.0 mm f/2.0.
(Higher diagonal sensor sizes are better; lower lens f-numbers are generally better.)
This is pretty pointless, as final image quality depends on a lot more than just the sensor, especially on a phone, but a better measurement of sensor quality is pixel size or density, as bigger pixels gather more light.
Pixel density is calculated as a ratio of resolution to area, is usually expressed in MP/cm^2 and lower is better.
iPhone 4: 5MP, 1/1.7", area 0.15cm^2, density 32MP/cm^2
N8: 12MP, 1/1.83", area 0.38cm^2, density 31MP/cm^2
As for the lens, I prefer wide angles, but again the raw numbers don't tell you much.
Specifications aren't everything, but the iPhone CCD is a 5 MP panel that's 1/3.2" diagonal. Not to look far, the Nokia N8 has an 12 MP CCD at 1/1.83" (resolution too high, but hard to argue with the sensor size). Point and shoot standalone cameras are normally around 1/2.5"; 1/1.7" is considered high end (Canon S95/G12 etc).
The iPhone lens is 3.85 mm f/2.8; the N8 is 5.4mm f/2.8; the wide end of the S95 is 6.0 mm f/2.0.
(Higher diagonal sensor sizes are better; lower lens f-numbers are generally better.)