Microsoft now targeting the netbook users, by giving them option to download and install Windows 7 via USB drive. For netbook users whom probably don't have a CD or DVD drive, this is actually a nice option to get a hold of the new Windows 7.
The Microsoft tool would download the Window 7 files into the USB and convert your USB drive into a bootable installer. The program may also be called Windows 7 USB/DVD Download Tool (WUDT). Remember you need to have a USB drive which has sufficient enough space to hold on all the files.
