First of all, apologies for leaving this unanswered for such a long time. I've essentially been offline for quite a while and haven't had a chance to check on Points of Light until recently.
For some reason, it looks like Lulu changed how access to their store works and Points of Light was set to private access only until I was able to log in and accept all the new terms and add the new info required for publishing etc.
It SHOULD be working now.