I just watched a video about the new Photoshop Tablet SDK:
blogs.adobe DOT com/photoshopdotcom/2011/04/when-vision-turns-into-reality-%E2%80%93-photoshop-cs5-interaction-with-tablet-devices%E2%80%A6.html?PID=2159997
(Mind the DOT, cause I can't post urls,....)
This looks like it could be used with artrage to enable collaboration with photoshop. I use a Win 7 Tablet which is absolutely great for painting but I'd like to have some enhanced editing features which are present in photoshop on my Desktop computer. It Artrage could be enabled to work with photoshop seamlessly, that would be really cool :-)