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
MubaRak Ho AapKo XaMs Ka TehVaaR Added On: 19/Mar/2009 by admin | Send
>> Mujhe 2 chizain bohat tang karti hain …
1, Aap ki yaad
Jo buhot aati hay..
2, LIGHT jo buhat jati hay.. Added On: 19/Mar/2009 by admin | Send
>> Recent Shurvey haz proowed that cute, intollagent, stylush,
hendsoam, beotiful peopal make sopalling mistokes in their writing,
whot is yur opinium??? Added On: 19/Mar/2009 by admin | Send