I have a maple kitchen table and it becamed stained when I left a
cooked piece of corn on the cob steaming hot, on top of the table on a
piece of paper toweling.  Unfortunately, the table was stained with a
white heat mark and I would like to know how to remove this stain. 
Someone suggested that mayonnaise rubbed into the stain will help to
remove the stain.  It didn't work.  Help!  What can I do?

Don't we all do it  - at least once :)

here are a few suggestions, including the mayo:

http://web1.msue.msu.edu/msue/iac/disasterresp/HomeImprovement/e1045.pdf

(scroll down to III )

http://www.thriftyfun.com/tf480173.tip.html

http://www.sunsinger.org/wellness/cleaning.php    (about half way down)

the mayo came up a couple of times more, once with the clarification:
"not just sandwich spread".

Good luck

Mayo shouldn't hurt the wood. I would also try rubbing a piece of
walnut meat into the stain. You could also use the type of polish used
to remove marks on antique and vintage furniture; it's usually sold in
the paint/stain section of home improvement stores.

Kriswrite