As SwitchEasy's entry into the increasingly popular hydrocarbon case genre, Vulcan ($20) is an iPhone 3G/3GS design with a few of the company's signature advantages. Beyond the price, which is aggressive by hydrocarbon standards, Vulcan includes twin headphone port and Dock Connector port plugs, twin screen protectors, a cleaning cloth and an applicator card -- collectively more than you'll generally find in the packages of competing cases. SwitchEasy…
