According to its 2.1.2 paragraph, it seems the NVidia license (
http://www.nvidia.com/object/nv_swlicense.html ) allows you to redistribute the Linux driver.
You say nothing about where you get the Wifi card drivers so you carefully need to read their licenses as pixellany already stated.
You may also need to somewhat rename the distribution as it won't be exactly Ubuntu anymore.
Of course I'm neither a lawyer, so I may be horribly wrong ...