I have now begun a more advanced version of the hand which will be larger, have more accurately scaled dimensions, better aesthetics, and, best of all, digit movement from side to side as well as both front and back. It may be quite some time before completion though.
Before you start, let me note that I made a left hand because I am right handed and wanted the ability to retain dexterity for everyday tasks while I was wearing the hand.
Also, credit where it is due, I designed this hand after viewing the most superb hand built by Aternox over at DeviantArt, and it seems I am not the only one, as a quick poke around DA shows.
This project is becoming more common so look around the web for variants and different styles. Another of my favorites (besides Aternox's) is beautifully made by IAteSatan also over at DA.
EDIT: A short video of the hand in motion can be seen here. I apologize for the poor quality - when I have some time I will try to record and upload a higher quality video.