A number you can use in triggers, I haven't found any other use for it...
In RPGS I usualy do a trigger that adds XP equal to the unit you kills' Point Value wich makes it easier to controll the XP.
In TDs the point value can represent the amont of gold that you gain when you sell the tower, this makes its a lot esaier.
As I said, i have no clue what it's properly used for..
It's a value you set in the object editor for units.
IIRC, it has something to do with awarding points to players who kill the given unit. The 'points' being the scores at the end of the game.
Nobody really uses it this way though. As you access the value with triggers, it makes it great to use as a constant value for unit types.
Some examples are mentioned in post #2.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.