The Musical Limerick

I love limericks.  They're singsongy, and provide an opportunity for quick wit and and often risque turn of phrase.  But how would you turn a limerick into a song?  What kind of music would go well with it?  How would one best express a limerick musically?

For example, this little funny...

'Tis a favourite project of mine,
A new value of pi to assign.
I would fix it at 3,
For it's simpler, you see,
Than 3 point 1 4 1 5 9

It's already sing-songy, but it's way to much like "La Cucaracha."