If you are looking for a RSS feed for your site which will supply jokes, you can simply use the feeder available.
Random Jokes Feeder link: http://freesms.parijat.biz/jokefeed.php
You can use a RSS reader to feed this information to your site. A simple use is being done on Funtelya website
Love >> If U sneeze once, Think I’m remembering you. If you sneeze twice, Think I want to Meet U. If U sneeze thrice, Think I’m Missing You. 4th Time, Fool Take A Tablet ! Added On: 25/Jul/2009 by admin | Send
>> Girls are like internet domain names… the ones I like are already taken. Added On: 25/Jul/2009 by admin | Send
>> Never make love in the garden or in the fields…… For love might be blind but your neighbours not Added On: 25/Jul/2009 by admin | Send