All the Halo fanboys went crazy during the E3. Major Nelson came out with this snippet about the Xbox Live content downloads during E3. Here is the list.

Top 10 downloads during E3: Bringing It Home:
1. Halo 3 Game Trailer (Microsoft Game Studios)
2. Lost Planet: Extreme Condition Free Playable Demo (Capcom)
3. Test Drive® Unlimited Free Playable Demo (Atari)
4. MotoGP™ '06 Free Playable Demo (THQ)
5. X-Men™: The Last Stand Pack (20th Century Fox)
6. Gears of War GameTrailer (Microsoft Game Studios)
7. Call of Duty ®2: Skirmish Map Pack (Activision)
8. Spiderman™ 3 Game Trailer (Activision)
9. Fable 2 Trailer (Microsoft Game Studios)
10. Uno® Xbox Live Arcade Game (Microsoft Game Studios)