The Scoring System...

Tile = 10 points
Corner Tile = 20 points
6th Letter = +10 points
7th Letter = +15 points
8th Letter = +20 points
9th Letter = +30 points
10th Letter = +50 points
Reused Tile = Word x 2
Quick Spell (within 1 move) = +50 points
Column Bonus (6 tiles in a column) = +50 points
Row Bonus (6 tiles in a row) = +50 points
Cascade Bonus (during Multi Word) = +50 points
Second Multi Word = Word x 2
Third Mulit Word = Word x 3
Multi Directional Clear = +100 points

Each move after 5 = -10 points