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 >> Apun wishing u a wonderful, super-duper, zabardast, xtra-badhiya, xtra special ekdum mast n dhinchak, bole to ekdum Jhakaas "HAPPY DiWALi" Added On: 25/Jul/2009 by Parijat | Send
>> 2day is a mobile day so plz open ur mobile cover & remove battery & dip in soap water apply candhana & kumkum 2 sim card & say “govinda govinda” Added On: 24/Jul/2009 by admin | Send
>> Khush to bahot hoge tum,Ki forward karne ke liye SMS mil gaya,Magar aab kya karoge…?Jab msg me kuch bhi nahi mila…?Ha ha ha ha Added On: 24/Jul/2009 by admin | Send