From the It Seemed Like A Good Idea At The Time Department:

Dell has changed its branding from "Be Direct" to "Dell E Com" (no comment). This comes with a new logo that has the old DELL (with the turned E), then a floating blue ball with a crooked E on it (complete with shadow underneath it), and then a gray COM. To promote its new branding, Dell has given each of us a styrofoam E-ball car-antenna topper, I guess to make it easy to find our cars in the Dell parking lot.

They're wonderfully aerodynamic.