They were funny at the time, are they still funny now (don't answer that)?
What does Princess Di find more attractive than a rich Arab?
A well-built Pole.
What did St Peter say to Di when she reached the Pearly Gates?
Wipe that Merc off your face!
Why is Princess Di like a mobile phone?
They die in tunnels.
What's the difference between Di and a couple of dollars?
It's easier to scrape together a couple of dollars.
Now, if I could just remember some of those NASA jokes...