What to do when I see - salesforce down for maintenance?
I created a Force.com site and linked a Visualforce page with it, but when I access the link I get down for the maintenance error page. I am not sure how to get my visual force page instead of this error. I made the force.com website active too but I still have this error page. I saw this help link - https://developer.salesforce.com/forums/?id=906F000000099UQIAY
But I do not know what it means by putting my visualforce in a folder.
In my experience, salesforce down for maintenance usually means you have an incorrect URL. make sure that you have found the correct link to the Site.
Example:
http://yourdomain.force.com/SiteName/apex/VisualforcePageName
The link you reference says that the person created a new site subdomain. Created a new "SiteName'' and it seemed to have resolved his error (my guess is that something else was going on).