Its' free and it takes less than 10 seconds!
The 'Jerry Springer Nudity De-Mosaic'
Image Stack Fun (Photoshop Extended)Similar Threads Photoshop CS3 Extended hangs on start-up Photoshop CS3 Extended Brush Trouble Photoshop CS3 Extended saves very slowly after installing Windows 7 Photoshop cs3 vs Photoshop cs3 ExtendedArt: In the stack - More guns!!! Updated, new image 03/19/07
and for a more practical application...
High ISO Noise Reduction by Image Averaging
Lets say you are in a museum: no flash allowed, no tripods allowed, but photos are allowed.
You can take a bunch at high ISO and average them together to get rid of the noise.