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
HIndi And Indian Sms >> Bhagvan krishna ne geeta me kaha hai, Kalyoug me ek acha dost hoga jo SMS karega our dusra sirf pad kar muskurayega. Hasooo or hasooo, Good Night. Added On: 24/Jul/2009 by admin | Send
>> SMS ka sangrah karke kya paayega vats? Balance ka moh tyag– SMS kar, mitron se sampark rakhne se hi moksha ki prapti hogi, SHUB RATRI. Added On: 24/Jul/2009 by admin | Send
>> Param Pratapji, Param Tejasvi, Maha Kripalu, Atyant Dayaalu, Pujaniya, Sarva Shaktishali, Del Maharani. Sone jaa rahi hai.Saare bhakt bolo GOOD NIGHT Added On: 24/Jul/2009 by admin | Send