I tried Peter Reinhart's light wheat bread from the Bread Baker's Apprentice. It's 33% whole wheat flour, the rest being white flour. The recipe gives the option of sugar or honey; I went with sugar because I don't think I have any honey.
It's a pretty easy one day recipe: mix, knead, wait, shape, wait, bake. And this is the result.
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Edit:
And after letting it cool for a little over two hours... I'm a bit disappointed with the result. The flavour isn't terribly exciting, but maybe that's just what you get with a one-day bread. In fact, this loaf reminds me a lot of the rather blah whole wheat loaf I used to buy at a nearby bakery. In the future, for sandwich-style loafs, I think I'm going to stick with 100% whole wheat formulas.