On Sat, 15 Jun 1996, Kergma, The Chaotic Trickster wrote:

And Ishido, Mihoshi and White Wolf answered quickly ;)

Um, none. 

I answered first!

forgetting her luggage.  The question is....who's the cabdriver?

The reader.

Too slow!  I got this one too.

What shape must a piece of wood be to cast (depending on how its held) 
shadows of a circle, square or a triangle.

Um...  I'm a bit baffled.  I could describe to you a peice of wood that
would do this....  (A cylinder with heigth and diameter the same, sliced
from top side to bottom on other side.)  But I don't see how this is a
riddle?