(FORTUNE Magazine) – Madison Avenue is always looking for interesting places to put its ads: the tops of taxis, the shells of eggs, the arms of beach volleyball stars. Paula George prefers a medium that's a bit more subtle: computer disks. As founder of SoftAd Group in Sausalito, California (1989 revenues: $5 million), she has created ''floppy advertisements'' for such clients as IBM, Ford, American Express, and BMW. Unlike print or television spots, these are pure examples of ''the medium is the message'': The disks have no content other than the company's presentation. They feature animated graphics and spreadsheets that help prospective customers understand the advertiser's product and calculate its cost. Some 90% of SoftAd's clients ask for business-to-business sales pitches aimed at landing big accounts. George, 37, is a West Virginia native who arrived in Silicon Valley a decade ago as a marketing exec. Observing that ''companies were getting very disillusioned with traditional marketing techniques,'' she founded SoftAd in 1985. George envisions computer disks eventually doing the work handled by traveling sales reps. Think of it as a new way to cut down on expense account lunches.