You are unable to use iPhoto 2 to publish to .Mac. This alert appears:
Important Notice
We apologize for the inconvenience, but the ability to order books and prints is no longer supported in iPhoto 2. Please upgrade to a newer version of iPhoto to order these products
Upgrade to a newer version of iPhoto. For example, iPhoto included with iLife '08 lets one publish pictures to .Mac via iPhoto.
Note: Earlier Macs that do not support iLife '08 can use iPhoto from iLife '04, '05 or '06 to publish (upload) pictures to .Mac.