Could be that something in your home internet has changed?
Have you installed anything new?
I had massive problems here a couple of weeks ago, sometimes the internet worked, other times I got that timed out message.
I eventually worked it out that one of the telephone wall sockets in this house had become damaged. Once I bypassed it, everything was fine.
Gamespot loads fine here..
Perhaps something is going on with your ISP?
If you have wireless you could connect direct to your phoneline to rule out any problems with your router, but short of that I have no idea what to suggest...
And what Jim said.