SUSE Studio is an online service by SUSE that allows one to build a custom Linux distribution based on openSUSE, SLED or SLES. This can be something very minimal to operate as a server and fit in spaces as small as 200M or a fully packed & customized distribution.
It gives you the ability to upload your logo, grub-menu background image, upload additional RPM packages or select from a myriad of packages already available from the software repository. In addition to this you can as well specify and activate different repos for your distribution.
To use the service you need a login id from Novell, Google, Yahoo, Twitter, Facebook or from OpenID. Once logged in the rest becomes easy as you browse along the progress tabs.
Visit SUSE Studio.