Let's start troubleshooting from your computer. We'll check for DNS (Domain Name Server). This is like the white pages lookup for your computer. Then we can check for Proxy. This being your work computer, access to the internet may be directed through a proxy and that website maybe blocked.
Are you using Windows or Mac?
Instructions for Windows.
In Windows, get to the command line, and type in CMD to get a terminal window.
Instructions for Mac,
Go to Terminal
Checking DNS
type in PING ustream.tv
You should get a response with the same IP numbers listed below.
PING ustream.tv (216.52.240.133): 56 data bytes
64 bytes from 216.52.240.133: icmp_seq=0 ttl=46 time=91.108 ms
Checking for Proxy, you'll need to go to the toolbar for the web browser. There should be one tab for network connections. The setting is called Proxy. You can google for exact directions for the particular web browser. Think of this as swapping out the whitepages for your company's customized phone list.
Another possibility is DNS hijacking. Your webbrowser or computer may have malware.
Think of someone taking away your whitepages, and swapping it out for one of those cloned yellowpages.
If you have admin rights to your machine. You can add the IP and name to the host file. Think of it as your PC's personal phone list. It will check that first, before resolving to DNS.
well crap, still broken for me.