One of my best investments/buys last year was an Audible platinum membership - basically buying 24 credits/audiobooks for roughly $9 each. Especially since a credit gets you even brand new books, irrespective of length, it's an insane value - almost like getting CDs for $3 or new video games for $10. I was never into audiobooks when they required lugging CD cases around but with Audible's iPhone app, they're actually the most convenient book form, since you can even "read" while driving, walking, doing housework, etc.