A bit behind the times, but this caught my interest. I think the tag cloud was an excellent idea. It organizes things in two instantly recognizable ways; alpha, which is great when you know what you're looking for, and intuitively (via visual weight), when you don't.

I'm sure you've had the experience where you're looking for something but you can't remember the right name, or you have another name applied to the concept than what its tagged as, or you forgot what file, or where it is. Your brain can pick out that right word a lot faster than you can, especially if the set of inputs is non-homogenous in appearance, plus the visual weights give you a wierdly human experience with the set of data.

PLUS, and this one should appeal to you, Rands, there is always the chance you might stumble across something totally new, unexpected, and interesting. Clicking on tags on personal content pages like MySpace and OkCupid has led me down some fascinating dark alleys of human psychology. I bet if the tagged data was actually something worthwhile, I'd find even better new input to hold my attention.

And hey, back to the idea at hand, its still in alphabetical order if you DO know what you're looking for.