This plugin stores all icons that your contacts use over time and comes with a viewer for the icons.
After installation, the album will slowly fill with icons as your contacts change them.
You can open the album viewer with the Contact Album
entry in the Window
menu and with the View Album
entry in the context menu for contacts.
Icons can be copied from the album viewer via Drag&Drop.
Currently the plug-in comes with English, Dutch, Finnish, French, German, Italian, Polish, Portuguese, Spanish, and Swedish localizations. Further translations are welcome.
The version of the plug-in available here requires Mac OS X 10.6 or later and an Intel-Mac.
An older version which only requires Mac OS X 10.5 and works on PPC-Macs too, is still available from my site: Contact Album 1.0.9
For more info and source code, visit my website