I am picking up a binding tool today (yay! My day to do errands!!) (small things in life, what can I say?) and it will make it A LOT easier to do the binding...
http://www.animasquilts.com/BMTinstructions.html
I had originally saw a tutorial for using a different tool and actually rigged up two rulers to get the same effect so that I could bind the wall quilt I was working on and it gave PERFECT corners. I was absolutely amazed by it... but then I saw this one and it looks just as easy if not easier than the other way and it's a lot cheaper so I figured I'd give it a go..
http://www.sewbizmarion.com/shop/Qui...nding-Tool.htm
The one I would have used is different than this one - I linked you to the one you'd need ;)