We have seen motorbike carry an integrated iPhone in the dashboard, and here is the iPhone for your bicycle now. The Bilogic iPhone case allows you to place the iPhone on your bicycle without worrying about the shocks, and weather.
Costing $60 the gadget has a 360ยบ swivel and combining an accessory called FreeCharge it allows you to charge the iPhone as your pedal your cycle. The Biologic iPhone case will come out only in January and I would guess that 4G iPhone rumors would have hit the istreet by then :P.