Go to System/Library/Image Capture. There we find two folders that contain some interesting stuff: "Automatic Tasks" and "Tools."
In "Automatic Tasks," we have "Build Web Page" (BWP) and "Build Slide Show" (BSS), both of which have been covered here before (1, 2).
In "Tools," however, we find "makePDF." Dropping a bunch of pictures on the makePDF icon creates a multi-page PDF file containing your pictures. Isn't much, but it might be of use to someone.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040418002944406