In the spirit of our last Week 07 “Share” Activity, I recently found this link on the Creative Commons Wiki about how to attribute Creative Commons images, and thought I’d link it here. We used a variant of it on our site. There’s really no hard and fast rule other than “be reasonable.”
http://wiki.creativecommons.org/Best_practices_for_attribution
Ps. It’s also worth a visit because the Creative Commons cupcakes on this page look rather yummy! ; )

“Creative Commons 10th Birthday Celebration San Francisco” by tvol is licensed under CC BY 2.0