I think it'd be cool if you could watch someone else's match and have some sort of monthly tournament between players and the winner and high placing people get more cards.
Pros and cons of lightning towers (after 1 hour of research [I have too much time on my hands]): Pros: Amazing upgrade speed. 900 damage to zepllins at level 5. At level 5 rate of fire=1 shot every 3 seconds. Cons: needs patiance. cost. Need 3 or more to be truly effective.
 "Smileys-War"){kind=icon}
 "Starfighter: Disputed Galaxy"){kind=icon}
 "Campaign Game: General Election"){kind=icon}
 "ZunderFury"){kind=icon}
 "Desktop Tower Defense 1.5"){kind=icon}
 "Kongai"){kind=icon}
 "Draw and talk in the chat"){kind=icon}
 "The Fancy Pants Adventures"){kind=icon}
 "Numeric Maze"){kind=icon}
 "Balloon Invasion"){kind=icon}
 "SHIFT"){kind=icon}
 "Tarnation"){kind=icon}
 "Boxhead: The Zombie Wars"){kind=icon}