After 25 minutes on hold with RS, I spoke to an agent. She was (understandably) a bit flustered, so this might not be correct, but what I gathered was:
* She couldn't take an order
* They weren't going to be able to take an order today
* What I should be doing is "registering an interest" online when the website comes back up
* Noone had ordered anything today, although a few had managed to register an interest before the website melted