dual nic use

[DarthLinux]

been trying to get 2 nics on my linux box to talk to each other..
long story short- i have a machine <tibook> with gigabit internal 
capability, and recently installed a netgear  gigabit nic.
after upgrading the kernel, it is recognized and more or less set up.

as my primary network storage device, i want to have the high speed 
link to it from the laptop, but while i can see the linuxbox thru the 
high speed network, i cant see the rest of the world-

i am getting ip resolution for the 10/100 nic as its my nameserver- so 
when i ping the world, it returns an ip address- but is not returning 
any packets..

any suggestions..?