Originally Posted by dteowner 
1) Is there a big performance hit going to wireless versus using the same equipment with copper?
When transfering data on SuperG: Huge.
A cable connection between two computers can go past 1000mbit while SuperG, even if the box say higher, rarely go above 2-3mbit of actual speed. (transfering a 500mByte file over the wireless network can take 30 minutes!
Only use wireless, at least SuperG, on stuff that runs on battery such as laptops and PDA's.
Ofcourse, if your internet connection is only 512kbit or up to 2-3mbit, it's ok.
Note that 1byte = 8bit so 2mbit per second equals 0,25mByte per second.