Made a quick clip showing how it works here: Subscribe to the TouchArcade YouTube channel I'll post instructions if needed, but its pretty straight forward, and is all done with a simple Dremel tool. Whats great about this being a dock is that it also amplifies the audio which works well for taking calls on speaker.
updated the original post's embed so its easier to see. I've also got another iCade Jr being delivered today, so I'll post some pics of the mod process this weekend.