
As it turns out, the top two shelves hold 16 boxes nicely. And each box holds roughly a project's worth of yarn (except for the sock yarn, of course.) Not that it's all of my yarrn, but it's almost all of the yarn I bought myself, as opposed to the yarn I got in the great wool-free-forever swap.
I figure I've already covered the cost of the boxes just by talking myself out of buying a bunch more yarn.
What's next? Well, I do have a little stack of books to reorganize...