So you've got hard problems, no time, and no money. Sounds like a typical web project to me.
Sounds familiar :). Christina Wodtke promises to teach you IA -- which looks like rocket science -- in a day. If the style continues like this, I'm going to enjoy rocket science a lot. However, I think this book won't deliver on one promise: it's not one of these books that layer one idea in ten pages with equally huge typeface and blank margins, so it is unlikely that it can be digested in one day.
More great stuff on IA at Boxes and Arrows.