I added a few subdomains on my site this morning and then also made a request for PHP upgrade. Does the site go down for this ?? coz I'm unable to access it now http://www.varunswebpages.com/
For a little bit this morning I had an issue wit hmy site too but IT came back, It was probally the same thing. If your site goes down try checking your account pannel on the www.x10hosting.com account page and see if any of the little dots next to services are red (especially look at the apache one)