Barbara and Keith Zimmerman are creating socks with a flair. STARTUP // SockAtudes ENTREPRENEURS // Barbara Zimmerman and Keith Zimmerman WHAT THEY DO // SockAtudes sells socks with colorful and striking designs. The company can create any sock design, and they require only a 24-piece minimum. The company partners with Rock Em Socks, an Orlando, Fla., business operated by a friend of the Zimmermans. Rock Em buys blank socks for…