since you wrote that you've got it brand new on christmas 09 - it has to be a 5th generation nano - this one has a camera.
you also wrote that the screen is cracked and splintered and you "taped" it - so the lcd is ok and only the glass panel is broken - right ??
you can order the glass panel replacement part for the 5th generation on ebay - this search should give you a good amount of results: CLICK
if your iPod has no camera - but looks like the one on the picture above - it's a 4th generation nano - in that case you can order the part from ifixit: CLICK
the installation instructions for the 4g or 5g are pretty similar.
here is the 4g: CLICK and here is the 5g teardown: CLICK.
since the teardowns are not as good as the repair guides - but you can use it to compare the two specific models - the needed tools are listed in the 4g glass panel guide