I recently had the opportunity to play with Dells newest latitude 2100 series netbook, the 2110. It, of course like is predecessors, has no media drives. It does have USB ports, obviously. I found a decent web site:
that allowed me to install Windows 7 without the need for a USB-to-IDE or SATA device to attach a CD-Rom to the netbook. Im in the process of installing it now but it looks promising.