Nigerian scam letters...

This is a site that talks about how some people actually scammed the
suckers back. They actually got one of the idiots to send gold dust.

http://www.scamorama.com/

Links on the right hand side, ones in red are stories where they played
along and got the idiots to send stuff to them first.

Here is another site that talks about the scams in-depth.

http://www.quatloos.com/

P.S., don't take the gambling advice seriously.