In reply to Tony the Blade: I dunno about an app (but cool idea for one anyway), but I've done that sort of thing with my photos, and used Auto Pano Pro which will stack photos in the way you mean, as well as just doing standards panoramas.
> (In reply to Tony the Blade) I've used this before: http://www.startrails.de/html/software.html
> It's designed for startrails but you can put any photos in and it will stack them or create an animation with them.
Ooo that looks cool. Might give it a look over the weekend.