The Easiest Way To Add Text In iPhoto
Anyway, without having to download or install anything, I set up Preview as an external editor for them. With preview you can do "text annotations" and because it's linked as the external editor when you edit a photo it instantly and seamlessly loads Preview and when you save the file it's instantly saved in iPhoto.
Granted there are much better editors out there the Preview, but this was quick and easy and the person was pleased as punch. This little tip may help you if you're looking for an easy way to add text with the tools already available on your Mac.
-Neil
17" i7 MacBook Pro, Mac OS X (10.6.6)