Scott Blum, founder of e-tailer Buy.com, stepped down as CEO and was succeeded by president/COO Neel Grover. Blum will remain chairman ... Robert McDowell, former senior VP/assistant general counsel of Comptel, has been confirmed by the U.S. Senate as a commissioner with the Federal Communications Commission ... Paul Fredrickson, an industry veteran who was most recently strategic marketing director for Mitsui Comtek, joins NuVision U.S. as marketing and strategic planning VP ... Kimberly Fabiano, ex-DBL Distributing, joins OmniMount Systems as brand marketing specialist, responsible for the company's advertising, public relations and corporate and product literature … Paul M. Bundick joins the NECO Alliance as sales and marketing executive VP, a newly created position … Roger Burfoot joins Labtech as sales manager for microwave-based components... Jeff Talmadge promoted from Denon marketing manager to director of product development and systems integration … Rick Richardson, ex-ScheduALL and Niles, appointed marketing manager for Cerwin-Vega and KRK, both owned by The Stanton Group … Joe Phelps, ex-Bose, named business development manager for Revolutionizing Product Marketing, the national sales rep firm that manages retail accounts and seeks new accounts for Cerwin Vega! home audio products ... Tracy J. Chandler, sales and marketing manager for Auralex Acoustics, named worldwide sales director, a new position ... Christine Schyvinck, operations executive VP for Shure, named global marketing and sales executive VP, replacing Michael McGinn, who has left the company. Rob Thompson, former global manufacturing director, named operations VP and will report directly to Sandy LaMantia, president/CEO of Shure ... Distributor New Age Electronics has promoted one executive and hired two others. Jo Ann Beluch, part of the remanufacturing division since 2000, has been named director of the division. Alan Schlangenhaft, a mass retail veteran, joins New Age as operations manager. And Blake Wakefield, ex-HP consumer distribution exec, joins the company as specialty sales director ... Adam Thomas, ex- advanced engineering director of Clarion, marketing VP, replacing Sally House and Rick Daniels, formerly Sony senior marketing manager of VAIO products, joins as retail marketing director, a new post ... Eric Concha appointed as international sales manager and Jason Hanon, former Eastern regional sales manager, named national sales manager at Audiobahn ... David Stollmack, co-founder of Audio Video Systems of Charlotte, N.C., which was bought by Tweeter and a former president of the Professional Audio/Video Retailers Association (PARA), joins digital media processing company Riptopia as senior consultant.