Wikileaks, though technically not a wiki, provides an easy means to disseminate information that some find it desirable to share against the wishes of those who find it desirable to keep secret. Aside from the morality of the leaking itself, such a service provides a look into the activities of...
Remember to make the lizards take the longest route you can when you put down your towers.
You can see the routes flying units take, so make sure they're covered.
Sometimes, it's worth upgrading old towers instead of buying new ones.