Is it Tempmas already?
Well, here's something I have been working on for a week or so for no other reason than I wanted to. So for GBATempmas I present: The Futile Pursuit of Wealth.
http://www.dailymotion.com/video/x55s0s7
try it through a proxy on proxy.org. If that doesn't work then it's something to do with your pc. If it does work then it's your ISP's DNS server cocking up (sounds like it if it is intermittent). Change your DNS anyway to google DNS http://code.google.com/speed/public-dns/ and see if that...