it's not a site you can open and visit from your standard computer. Only your web enabled cell phone or other personal data devise equiped with a mini-browser. There are 2 types of "web" sites: HTML (which is the standard web site language you are reading now) and HTMD (which is a special text only web site created specifically for text only mini browsers).
Go to
YoSpace and you can check out various emulators e.g. YoPad. Yes, ua2go.com is visible from that site.
Mind you, I tried MEL-SJC and it came back only with flight 4924, so it's not quite what I expected.