Recovering deleted items

Does anyone know how I can recover items from my recycle bin after I have already emptied it? or does anyone know of any freeware recovery software that can do the job?

Any help would be much appreciated

Pandora Recovery. Its saved my bacon a few times.
http://download.cnet.com/Pandora-Recovery/9241-2094_4-11002955.html?messageID=10858464