I just saw that one can now have a custom facebook URL… and I grabbed mine. At facebook I am now found at: www.facebook.com/gdanmitchell.
Even if you can’t imagine why you would want such a thing right now, just do it. There is nothing to lose and potentially something to gain. These short and logical URLs are much easier to remember (or even guess!) than the odd ones formerly used at Facebook. If history is a guide, the good ones will go fast!