Top 10 jokes

[Montague]

A man dies and goes to heaven. He asks to see the Great Rock Band in Heaven perform, and St Peter takes him. There's Keith Moon on drums, Jimi Hendrix on guitar, Elvis singing, John Entwistle on bass, Warren Zevon on piano and at the left side of the stage, a guy dressed in black with big fly-eyed shades, hair slicked back, playing harmonica.
"Bono? When did he die?" the man asks.
"Don't mind him," St Peter says, "It's just Jesus. He thinks he's Bono."

[Babar]

If leper jokes is what you go for, far simpler to hear them all at once in a song, instead of seperately:

Finger food and an ice cold keg
It won't cost you an arm and a leg
Dance all night to a rotten band
Come on, people, let's give 'em a hand

Saturday night, it's the place to be
Everybody cut footloose with me
At the party at the leper colony
Oh, there's a party at the leper colony
Hey

Met a little lady so pretty and young
She was quite a little talker 'till the cat got her tongue
She oozed up beside me, I turned on my charm
Well, pretty soon she was completely disarmed

I said, "Girl, now don't fall to pieces on me"
But she cried her eyes out - literally
At the party at the leper colony
Oh, there's a party at the leper colony
Hey, hey

Hey now, buddy, don't you give me no lip
Sorry I was using your head for dip
There's a guy in the hot tub, I don't know who
Wait a minute, it looks like Stu

Well, hold the phone now, what do I see?
Another pretty mama got her eye on me
At the party at the leper colony
Oh, there's a party at the leper colony

[RickJ]

Here is another variation on SpacePirateCaine's joke:

Two guys die and are at the gates of heaven.  St. Peter asks each of them how they died.

The first one says "I froze to death!".  St Peter just says "My! How unfortunate!" and puts a mark in a big book.

The second guy says "I had a heart attack".  St Peter asks "How did you come to have a heart attack at such a young age?" 

The second guy explains "I suspected my wife of adultery and left work early to confirm my suspicion. When I arrived home, I heard some commotion upstairs and was sure another man was with my wife.  I rushed up the stairs to confront my wife and her lover but my wife was alone.  I was convinced that there was another man in the house and began frantically searching.  I rushed from one room to another, up the stairs and down but still couldn't find the other man.   I leaned on our freezer in the basement to catch my breath and  realized that I hadn't looked in the attic.  So I sprinted up three flights of stairs to the attic and the last thing I remember was opening the attic door and collapsing. The next thing I knew I was here."  He continues "St Peter, If I hadn't been so jealous I would still be alive."

The first guy interrupts and says "If you had looked in the freezer we'd both still be alive."

[paolo]

I have a little collection of Leper jokes.
Here are three of my favourites:

[snip]

...and one for his knob...

Q. Why did the Leper fail his driving test?
A. Because he left his foot on the accelorator.

Oh, when you said "one for his knob" I thought the last joke was going to be about a leper who loses his... ahem. But that would probably be a sex joke, wouldn't it?