It's because the DNS settings are changing over, and depending on your ISP, your settings may or may not have changed yet.
Yesterday, the site was fine for me, but when I logged on today, everything was completley broken. This is because my ISP's DNS settings were updated today (well, the new entry)... so I re-did everything to facilitate the new DNS settings which may not have been set up on your ISP yet.
So basically what it comes down to is within the next 48 hours, everyone's DNS settings should be changed and everything should be working again.
Matt