Smart playlists, photo albums and mailboxes find music, photos or messages for you.
iPhoto scripts and helpers
iPhoto 4 brings in keywords, making it easy to group photos.
Email a photo
iPhoto makes it easy to email a photo in a couple of clicks.
Create albums
How to group photos into albums manually in iPhoto.
iPhoto Basics
iPhoto makes it easy to store and organise photos and other images on your Mac.
OS X and Desktop Pictures
A couple of ways to set Dekstop Pictures in Mac OS X.