(FORTUNE Small Business) – Former WebMD Honcho Jeff Arnold has a plan to get back on top--of soda, that is. The dot-com's founder has a new business called LidRock that embeds pop-music CDs and videogame CD-ROMs in the lids of fountain drinks. Theaters and fast-food joints buy the lids, which took off in the fourth quarter, bringing in $8 million in revenue. True to his roots, the Atlanta-based Arnold thinks big: He says his lids will revolutionize the entertainment industry. Which leaves just one question: You want fries with that? -- CAROLINE WILBERT