To anyone who is wondering about the warranty issue, I looked into it and called Nissan a while back and it will not void your warranty. Car owners are protected by federal law when installing aftermarket parts. The main reason is so there remains competition in repair and maintenance parts, otherwise it would be too easy for Nissan and other car manufacturers to sell exclusive "warranty approved" parts for an inflated price.
In short, it does not void the warranty. However if there was ever a problem and for some reason it was found to be the air intake at fault, then you may be out of luck for coverage. BUT the chances of anything going wrong with an air intake is supremely unlikely. If you think about it its really just a tube with a filter on it so just make sure you wash the filter or replace it regularly and I guarantee you will be fine.
Heres a great link if you want to know more about all warranties.
http://en.wakopedia.org/wiki/M...y_Act
Also if you really wanted to, you can easily swap in your original intake. There isnt really any way the dealers can know if you had an aftermarket intake.
Hope this helps someone!!