Why wait for August and pay Apple a premium? If you have an 8GB USB key and you can download the Apple OS X Lion installer from the Mac App Store, you can make your own bootable USB key. It's ...

Jesus Vigo goes over the steps to create a bootable USB to install OS X 10.7-10.8 and OS X 10.5-10.6, as well as how to put multiple versions on the same USB.