Ya chuck the dice in from the top. I've taken to throwing the dice at the inch or so of back wall and gravity takes over from there. Note the uneveness of the ramps. I say it adds that nice random touch.
This is a view from the bottom. For those of you who like those things...
This is the transformed version. Essentially the tower is two pieces for easy travel! I should have taken a pic with a ruler so you can see the size. The other pics with dice are good reference. The dice are the standard BIG ones that came with Axis and Allies, not the small ones from the SKs. Also, check out the keyboard in the background. It's not small, but it's not big.
Nothing says geek cred better than a self-made dice tower. Next? Pimpin' it out. (I'll take suggestions.)