id Software's Christian "Disruptor" Antkow sends word that problems you may be having connecting to id at the moment are probably due to a denial of service attack, or the measures being taken to combat it. Here's the email he sent along, since even .plan updates are not working for them at the moment:

Connectivity Problems with Q3A

To be blunt, we are currently the target of a major denial of service attack which was started at 3pm CST this afternoon.

The perpetrators of this denial of service are saturating two full DS3's coming into Dallas, and are affecting all Savvis, UUNet, and Sprint connections locally.

To combat this attack, Savvis, UUNet, and Sprint have implemented access filters blocking certain traffic to our entire class C, and are blocking our DNS server entirely.

Savvis will be monitoring the situation throughout the evening, and I'm expecting a wakeup call at 8am from the morning tech crew at Savvis for an update. I will be calling the FBI in the morning to proceed legally on this attack.

I sincerely apologize for any inconvenience this is causing you. Believe me, we are as frustrated as you are.