I really like the aged photo effect you can create at this Japanese website, so I attempted to duplicate the effect in Photoshop. These pictures I took in San Francisco last year seemed to be a good subject.
For my first attempt, I used the Aperture 2.1’s sepia tone & vignette effects and then used Photoshop’s film grain filter. The result was a little too bright and didn’t really look aged enough.
Finally, I got an effect I really like with a few Photoshop actions. I used the Sepia Tone Grayscale action, the Spatter Frame action, and the add noise filter.
Here’s the original version of the second photo.