Dust or host/stuck/dead pixels are generally not considered as a problem for a photographer. Modern DSLRs (e.g. the Canon 5D mk2) have built in defective pixel remapping. Most RAW processing software (e.g. Lightroom and Bibble Labs) have a feature to automatically fix defective pixels. When the picture was converted to JPEG it gets a little bit more complicated since the strong discontinuity of a hot pixel causes JPEG compression artifacts in the surrounding pixels. However sufficient tools exist to fix these spots with a minimum of effort. It's more tricky when using your DSLR to shoot video. Since this is a relatively new feature on DSLRs the defective pixel problem or the dust spots in the captured video is also new. There are not much tools yet available to fix this problem. To make it even worse... For reasons not known to me Canon does not even use the defective pixel remapping data that is available in the camera during video capture. In video hot pixels show up the doesn't show up when taking photos. StuckVideoPixelRemover is a plugin (currently only Sony Vegas on Windows is supported) to remove the hot pixels and eventual dus spots from your video footage.
||Sony Vegas 8.0