The title and description settings for an iPhoto image in iPhoto 08 can be modified using the information explorer in the bottom left hand corner of the app window.

The explorer can be toggled on and off using the blue i button.

If you are scripting iPhoto the information title is presented as the title property of the photo object. The information description on the other hand is available as the comment property.

Wanting to provide networked Time Machine backups for a number of macs I decide to try the Iomega StorCenter ix2-200d. This has a wide feature set and a low entry price. Of course, you can build your self a FreeNAS based system that will offer much of the same functionality but the automatic support for Time Machine is what did it for me.

The Apple open source site at http://www.opensource.apple.com has a fantastic browsable repository of open source OS X components. Notables are (check for more recent versions on the source site):

libc - C libraries including stdlib

xnu - the base OS X kernel

objc4 - the objective-C runtime