It's over â€"- that being Barnes & Noble 's (BKS) proxy election results held at its annual shareholders' meeting this morning. And you can bet that upon hearing he's still chairman, Len Riggio is exhaling deeply. The company's other nominees also won election to the board, and Ron Burkle's Yucaipa Companies bid to amend Barnes & Noble's poison pill was defeated. But for Riggio et al. the toughest work is yet to come.