Looks as if EA were kind enough to drop in easter eggs for SimCity iPhone.   Two cheats have been discovered and they pay dedication to the original SimCity 3000.  Shake your iPhone to bring up the cheatbox and then enter the following:

“Nerdz Rule” – Unknown at this time

i am weak” – Will allow you to build at no cost

pay tribute to your king” – will give you all of the rewards buildings.

The others have been tested, but so far only these two work.

Source:  VentureBeat