I think it probably crashed after BBC 606 shut down. It was only created recently and the owners kept asking for people not to advertise it en masse, as it wouldnt be able to handle a large amount of traffic so soon. Of course, it caught on quite quickly due to it being practically identical to 606, and I think 606 suddenly kicking the bucket meant too many people going there at once, something it couldnt handle.
I hope it comes back.