iCloud Photo Sharing?

[Snapperjw]

Does anyone know if this is currently down?

I've tried to send an invite email but when they click on the icon/link in the associated email you get the following message:

"An error occurred while joining this photo stream. Please try again later"

Anyone got any thoughts? Also I can't access photos via www.cloud.com this tells me there is a problem.

Thanks, Ian.