From:  
http://graphicssoft.about.com/od/exifsoftware/EXIF_IPTC_XMP_Software_Meta
data_Readers_Editors_Extraction_Tools.htm

"Almost all digital cameras store extra information, called metadata,
with your pictures. The extra information captured by your camera is
called EXIF data, which stands for Exchangeable Image File Format. While
most current photo manipulation software supports the reading of this
information, there are many specialized tools for reading, editing,
extracting and converting EXIF information.

"You can also store information in your pictures using other types of
metadata. Two of the most commonly used formats of metadata for photos
are: IPTC, the standard developed by the International Press
Telecommunications Council; and XMP, the "Extensible Metadata Platform"
developed by Adobe. The software listed here is designed for working
with all types of metadata including EXIF, IPTC, and XMP."

Follow the link for a list of EXIF data manipulation software for
Windows, Mac, and Linux. None of them seem to do exactly what you are
looking for, but the ones which extract EXIF data and write it to a
database or spreadsheet file could be used in a Photoshop action.

Hope this helps,

--k