The secret passageway to my lair 
If you ever wanted a bookcase that was really a hidden door to your private office,
these folks can do it for you. (Via
BoingBoing; this actually
is a Wonderful Thing. Unlike, you know,
Unwonderful Things.)
I don't know about you, but I have
always wanted at least one secret passageway in my house. In fact, I always thought it would be awesome to have a passageway leading to an outbuilding or an underground complex.
My dad wants to build a compound underground, with a little house on top so no one would suspect. I guess that's where I get it from.