There is a demo version of Civilization port - it is free, so you can try it before buy (great game by the way, if you like civilization type of games). It is nearly full game, it just does not allow you to save.
Plants vs zombies is another good game, though I did not play it on iPhone, however, I can see how it can be easily translated to touch interface.
And for those who are bitching about android games - there are more iPhone users than android users, so it is natural to have more iPhone related stories. Plus, while it is gain for iPhone users to have an iPhone related story, it is not a loss for android users - just do not read the story or stop bitching about it if you did. Grow up.