Great link to a number of built-in beds. Some of them have very clever storage built in and nice safety rails for the top bunk.
Custom built-in bunk beds – two twins over two queens with drawer steps. | How Do It
Frame built around wall paper - this could be so cute as a "headboard" for a bedroom.
Home Decor Ideas
VIEWline 12" Digital Picture Frame, Black Wood Frame, 1GB Built in Memory with Remote Control