Actually, it might be happening again. I notice that each time it happens, I check their website to find that it's loading very slowly. This one has been about eight minutes so far, and their website is delayed on my part as well.
Well, they were under attack recently, according to this post:
Update: Yes it appears it's an amateur DDoS attack coming from some Tor nodes. We've tweaked some things, and the site is working much better now. Will keep monitoring. Regardless of site availability, bet options always work, since Bitcoin is so badass.
Maybe it's happening again. Although from what I understood the attack was only against their website, not their bet processing server.