setup a post preview/tease to link outbound to a different blog

hey
i need to setup a post preview/tease to link outbound to a different blog or in other words make post go to a link instead of a post –

find an example of the kind of thing I need
http://www.photoshoplady.com/photoshop-tutorial/collection-of-mothers-day-tutorials-illustrations-and-templates/

– is there a plgin ?
– what code could I use ? any links to advice ?

cheers
B