I have mentioned this before in another thread, but I think it deserves a thread all it's own.
If you have an iphone or ipad, there's a wordprocessor you can get which can use Siri to read stories to you. It's called Textilus, and it's very easy to use. Just copy and paste the text into a file and select "Read Aloud" from the menu.
But fair warning, it is pretty crap. I do hope they improve upon this technology, but in the meantime It does me want to put money toward a real audiobook...