Sig : I was trying to find a good flickr icon to use for tree icon (one that scales nicely in 16x16), but didn't come across any good ones :( the flickr favicon too looks bit cluttered. Please point out if you come across any
Matt : Yeah, it would be good to move RestfulServices to Sapphire and allow to extend it with other modules. As REST becoming a standard for web apps it would be a good move. Definitely it's not just for Web Services, see how RoR uses REST to cleanup it's controllers. It would allow web apps to extend freely while following common convention.
I would then make the FlickrPage expose an error saying the same. One important note: If the API key is not set then have one explanation, whereas if the API key isn't valid then have a seperate error message.