This is a program on our Channel 7. Two teams of two compete over three rounds to name the most subjects which comply with a given question. For example, the question might be "How many countries can you name whose name begins with the letter Z"? The first team may nominate 4, the second team has the opportunity to increase that number, the first team has the right to go higher etc. Eventually, one teams drops out. The other team has to then list the specified number of countries. Giving a wrong answer or failing to come up with the required number means that team has lost the round. Of course, answering correctly means the team wins the round.
The wiki page is
<
http://en.wikipedia.org/wiki/The_Rich_List_(Australian_game_show)>
The link given there to the official site doesn't appear to work at present.
I don't know if it has been turned into a board game and if so whether it's "hot". I don't move in those circles.
Hope this helps.
Cheers