Internet Sharing Xbox 360 (Not via Ethernet)

Hey there everyone! I've been reading around and I see alot of people who have a problem similar to mine, but they have been able to remedy this problem.

The average connection I've seen is
Wireless Router--(Wifi)-->Macbook--(Ethernet)-->Xbox360

A wireless to wired bridge.

I have done this before and it has worked well; but now I want to try something different. Recently I bought a Blackberry 8130, which has 3G Data, and Bluetooth wireless. I have been able to setup my blackberry as a wireless modem for my laptop via bluetooth, and it has worked flawlessly (I get around 200-300kilobits/second)

So now, as you might have already guessed, I want to bridge this wireless connection to my Xbox 360, wirelessly.

A wireless to wireless bridge, hehe.

Anyways, here's how it would be mapped out

Internet--(3G)-->Blackberry--(Bluetooth)-->Laptop--(Airport)-->Xbox360

Crazy right? Well so far I've been able to get everything working (USB Wireless Adapter connects to my laptop's Airport card, the IP Address gets confirmed (I use the IP Address I see under the Airport settings +1 as the Xbox360's IP address, the Subnet Mask I see under the Airport settings as the Xbox360's Subnet Mask, and the IP Address I see under the Airport settings as the Xbox360's Default Gateway)

It's just the DNS servers that are killing me. That's the only part that fails >.<

Can anyone assist me?

Thank you!

PS: I'm running on a Macbook Pro with Leopard