It still functions properly? If so I'm with Wagner... or just buy a new one. Unload the damaged one on ebay for a cheap price, fully disclosed to get some cash back.
Check this auction... cracked screen iPod with multiple bids currently going for $212 and over 4 days left!
http://cgi.ebay.com/Apple-iPhone-8GB...QQcmdZViewItem
Look how many more, most with bidding activity:
http://search.ebay.com/iphone-cracke...Zm37QQfromZR40