I now buy ripcords instead of wall warts. They have given my millions of odd ubiquitous USB adapters an actual purpose in life. And my tiny play area is now neatly free of chunks and loops of ugly black wire.
Note that if you plan to use a usb "strip", like a powered hub, be aware that the cheap ones usually cap out at fairly low draws, so unless you've really gone for a heavy duty one, don't expect to run more than 2 of these on max load.