Tekkeon has introduced its new myCase line of cases for the iPhone 3G and 3GS. Made from form-fitting, non-slip silicone, each myCase features a two-layer design, allowing the user to keep both layers on for a three-dimensional look, or remove the outer layer for a more traditional-looking case. Other features include access to all ports and controls, and an included myGuard screen protector. Tekkeon’s myCase for the iPhone 3G and iPhone 3GS…