To quickly convert your long ebay or amazon URLS to a shorter link, just enter http://eB.AM/ at the start of the address
eg. http://eB.AM/http://www.amazon.com/Apple-touch-Generation-LATEST-MODEL/dp/B001FA1NZU/ref=sr_1_1?ie=UTF8&s=electronics&qid=1247785964&sr=1-1

It's quick to type on your mobile for fast searching of items and will geolocate to your nearest site.
Use it to pass links on Twitter or SMS to not use up your character count, or just to look neater on Facebook

Amazon StoreFront Owners:
Use links on your pages to sell your items:
http://YourStoreName.eB.Am/
or eg. if you want to sell them your green stuff use
http://YourStoreName.eB.Am/green

eBay Sellers:
Use links on your pages to sell your items:
http://eB.Am/YourUsername/
or eg. if you want to sell them your green stuff use
http://eB.Am/YourUsername/green
and
Add a share button in your eBay listings
Use the following code
<a href="http://eb.am/"> <img src="http://eb.am/share.png" border=0> </a>
 
This will get the item number from the referrer info which is available on most browsers, but you can also use:
<a href="http://eb.am/?youritemnumber"> <img src="http://eb.am/share.png" border=0> </a>
replacing youritemnumber with your eBay listing item number.

or, if you're feeling adventurous, use this javascript code to do it for you
<a href="http://eb.am/" id=eBamShareLink> <img src="http://eb.am/share.png" border=0> </a> <script type="text/javascript"> document.getElementById('eBamShareLink').href='http://eb.am/?'+document.location; </script>