Anything via my WiFi network can't access the site, but I can access it from the iPhone, and http://downforeveryoneorjustme.com/ says it's not down. Could my IP be blocked from accessing the site? This is a site I bought, and it periodically goes down. If I use a proxy then I can access it. Not sure where I was supposed to put this.
Try using a different computer and see if you can duplicate the problem. Sometimes I get this issue and it's actually a problem with my own cookies, network settings, something I downloaded that somehow messed up my computer settings etc. If this is the case, try using cookie/temp file/junk cleaner software like CCleaner. Anti Adware and AntiVirus scans are also recommended.