Walter Becker, guitarist, bassist and co-founder of the Rock and Roll Hall of Fame-inducted band Steely Dan, died Sunday at the age of 67."I intend to keep the music we created together alive as long as I can with the Steely Dan band," Fagen promises of Becker's legacyBecker's official site announced the death; no cause of death or other details were provided. "Walter Becker was my friend, my writing partner and my bandmate since we met as students at Bard College in 1967," Donald Fagen wrote in a tribute to Becker. "He was smart as a whip, an excellent guitarist and a great songwriter. He was cynical about human nature, including his own, and hysterically funny."Becker missed Steely Dan's Classic East and West concerts in July as he recovered from an unspecified ailment. "Walter's recovering from a procedure and hopefully he'll be fine very soon," Fagen told Billboard at the time. Becker's doctor advised the guitarist not to leave his Maui home for the performances.