As the joke goes, the RSI website has been effectively undergoing a DDOS attack, by us (the loyal fans) as we constantly hit them up with page requests. It was awful most of yesterday, I think it was finally late in the afternoon when I got in and was able to get the Arrow warbond page and buy one.
I'm predicting the same this weekend...expect the website to get slammed when the new exhibit opens at the IAE, and then calm down slowly, with traffic picking up again as late evening hits the EU and US.
Good luck! and be patient...