Groupon has a deal today for CafePress, for $15 you get a custom iPhone case from CafePress (a $29.99 value). Shipping, which should be around $3, is not included. Deal details…. The personalization of hard-shell, felt-lined iPhone 3 or iPhone 4 cases begins with a choice of a white, pink, or silver base color. Customizers then use the online design tool to [...]