I believe, I have solved the error 403 problem by launching the command prompt in my Windows 7 system and then typing this:
ipconfig /flushdns
You need to be an Administrator to do this.
Hope this helps.
Same problem here and I have absolutely nothing on the website. I am just testing if this service is reliable to host my blog but it looks like it is a joke! I am getting this message - click on this picture to enlarge it: