to use it you will have to install ASUS AI suite, generally on the mobo disk or via asus website - find ur mobo the click on the downloads section.
yea it does dude - http://www.asus.com/Motherboards/MAXIMUS_IV_EXTREMEZ/#specifications
scroll down, n its listed.
I'll have a look at mine later see if I can get it working. Your phone should charge straight from the USB without that utility, I think it's just a fast charge tool. Failing that you should be able to buy an adaptor from USB to three pin plug like you get with the iPhone.