It's legit. What, you want 20 pictures of my room to prove it? Have a little faith, people. Search Google, you will not find this identical picture anywhere else.
http://arcademayhem.net/StackedGolfBalls.jpg is where I'm keeping it. Arcade Mayhem is my site.
EDIT:
Oh, by the way nuclearrabbit, it's a little more challenging than lining up the dimples. Gotta keep the whole thing in place and steady, or the bottom two lose stability and fall apart while you're puting on the third.
Also, it's impossible with bowling balls. You can't stack a perfectly round object unless they are spinning at extremely high velocities and there was no other movement to affect it (ie, gravity and the revolution of the earth around the sun).