You'll just need to make a small preferences change.
On Snow Leopard, go to System Preferences > Trackpad > Tap to click
On Leopard, go to System Preferences > Keyboard & Mouse > Trackpad > Trackpad Gestures > Clicking
I think I am correct on the Leopard method. I don't have an install anymore, so those instructions are from memory only.
Good luck with the new Mac! 🙂