My laptop won't see internet, but can see the network

I have Comcast internet service. The Modem is connected to my AirPort Extreme (n + gig-e) and the ethernet is distributed with a linksys gig-e switch. My PowerBook can still see the internet via a wireless connection (g) and the G4 PowerMac can still see the internet via Ethernet through the switch and router, but the MacBook Pro cannot see the internet using either the wired or wireless connection. It gets an IP address (MAC reservation) from the AE and it can connect to the other computers on the network, but it is not seeing the internet. I am assuming there is something screwy happening to the AE because the MacBook Pro connects to the internet just fine when I take it to work and my friend's PC laptop had the same problem on my home network.
Any advice would be greatly appreciated. This is driving me nuts!

Seems like it is a DNS issue of some kind.
I changed the MacBook DNS servers to a bunch of public ones and now it seems to be working again.
I found them here: http://www.tech-faq.com/public-dns-servers.shtml

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My laptop won't see internet, but can see the network

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