Yes I have a router (Linksys).
Shut down everything, ran ipconfig/flushdns. Reports it successfully flushed the cache.
Shut down windows and restarted it. Tried it again.
No luck.
If I can get hold of a wireless laptop, I'll try it at the library and here, to try to isolate the problem. My other computer doesn't work for that site, either.
Woe is me.