Consider a Facebook application that takes the pictures in somone's album and converts them into a flash side show. Flash during transition, fade, repeat pictures, short delay, plan and scan. Like a music video.

Interface to build a slideshow video. Select pictures, select theme, preview. Option to tweak output. Publish to the home page. Inline preview of the first 5 seconds.

Find out if javascript could be used to load the images off the facebook servers and do dynamic transitions. Another option is to send all pics to another server and do the processing there. Also check out the possibility of a Flash prrogram.
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