i just got a PM asking about cleaning dust from a camera's sensor. i'll add it to this thread because i think it's good info.
it's actually not that hard to clean. i've done it myself without any problems. first, i would try using air blasters. the one i use which doesn't cost much ($8) are called Giottos Rocket Air Blaster. do not ever use compressed air. very bad! you could accidentally blow chemicals into your sensor.
if that still doesn't work then you can try a solution and swab kit. something like this..
https://www.micro-tools.com/store/it...e=DIGI-KIT2D-F
check out these youtube videos. it's quite easy.
http://www.youtube.com/results?searc...&search=Search