There’s a surging sea of portable speakers out there for iPods, but ones designed to work well with iPhones are a rarer breed. Which is why I’m impressed with DGA’s Livespeakr, a collapsible, battery-powered speaker setup that was designed with the iPhone in mind and which delivers very good sound quality considering its cost ($99 list in black or white versions; $85 at the Livespeakr site) and size.