This is exactly the iPhone case that you are looking for. This Star Wars Stormtrooper iPhone Case looks awesome and it is the perfect iPhone 4 accessory for any Star Wars fan.
Let the Empire protect that expensive phone with one of their soldiers. Your iPhone will be protected and it will look nice and geeky at the same time. Nothing gets past a Stormtrooper. Except maybe an Ewok. Or a Jedi using the Jedi mind trick.
This awesome iPhone cover is just £7.99 from Forbidden Planet. Also available at Amazon.com, eBay.com and IWOOT.com.