Behind the Music A music site's uploading tool cranks up the sales volume to get things rocking and rolling.

Dave Stack traded a dotcom gig for the music biz when he openedan online music marketplace, MusicStack, and tuned up the buying and sellingtechnology behind the music.

MusicStack is a collection of record stores, all competing onprice and selection, offering both new and used music."Worrying about fresh inventory is not a problem," saysStack of his $5 million business. An uploading function updatessite selections in real time and allows the site's 3,000sellers to manage their own wares.

"The sheer volume of items on the site makes medifferent," adds the 34-year-old programmer. With 15 millionitems, including CDs, vinyl, MiniDiscs and 8-tracks, Stack'sstorefront eclipses retail giants Amazon.com and eBay.