I've always bought OS X separately from my new computers and I was planning on buying a new machine this Fall. The recent delay of Leopard coincides with my plans, so I think for the first time I'll get a machine with the most recent version of the OS preinstalled. Here's my stupid question: do new computers come with the OS on a disk that allow it to be installed on other machines? I'd like to install Leopard on my office machine and on my wife's MacBook as well. Thanks in advance for your help!