here is a sample from shooting i did today.

the aspect ratio is 2:1 and i shrunk them down to anamorphic dvd size (before horizontal squash) 854 x 427.

its big (340 k).

http://www.letterstoyou.com/noise00.jpg

they are in order from top to bottom
1) the original untouched frame
2) the frame after the levels have been adjusted
3) the red color in b&w (using revision smoothkit viewer)
4) the blue color in b&w (same)
note the large chroma noise
5) the final color timed picture. i used smooth kit guassian to soften the noise and then added a small amount of grain for a slightly more filmic look. its from a flashback, so thats the reason for the color grading.

hope this is somewhat useful.