Use your Kindle to give your Computer free 3G Internet
Not for the technically faint-hearted, but anyhoo:
You know how the Amazon Kindle 3G models come with free, well, 3G interwebz, right? For life (or until Amazon change their T&Cs)!!!!
Well, a clever hacker found a way to tether the Kindle.
And if you're clever and persistent, you can too.
Just rouse your grey cells and head over to http://lickitung.it.cx/page/tether.html