EDIT: This problem was resolved by my ISP - had to do with damaged fiber in one of their locations. Thanks to everyone that helped.

Not sure if this is the right site (I'm a StackOverflow user) so I thought I'd give it a shot.

I'm having trouble connecting to certain sites on any of the 3 machines that are on my LAN. The following sites are returning "Problem Loading Page - The connection has timed out"

Sourceforge.net
CNet.com
Microsoft.com
OpenDNS.com
even my company's webiste

I was worried about possible malware/virus, but I don't think that is the case (given the inability to access my company's site and the fact that all 3 machines are having the same issues.)

I've tried with IE8, FF, and Chrome

I have reset my router (WRT54G) and my machine(s) multiple times.

EDIT: It is also worth noting that this page spins constantly and no avatars show up (I'm assuming it is trying to access gravatar.com with no success.)

EDIT: I have the same issues directly connected to the modem. So, any router config is probably not the issue

I'm a programmer, not a network guy - any ideas?