You may have heard Cogs is coming to iPhone (this as well being published by Chillingo). Cogs is a bit like Geared for iPhone but on steroids. You might have played it from PC, and this is the same, just ported to iPhone:

Cogs is a puzzle game where you will move cogs, pipes, and such to activate a mechanism. Move the gears so that they move the other, arrange the pipes so the gas gets to the balloon etc.

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Cogs comes with 50 unique levels and three gameplay modes, you’re packed in hours of addictive fun. Having played with the beta, I really like how it plays on iPhone. The graphics are great and the controls feel natural.

Cogs iPhone will also have an in app store to buy additional levels, adding more content to the gameplay (and apparently bringing the level amount higher than the PC version). Cogs for iPhone has been submitted and should be landing in the AppStore soon.