A few quick facts regarding Xbox Live straight from MS themselves....

- Over 80 percent of Xbox Live members download content from Xbox Live Marketplace.
- Almost 70 percent of Xbox Live members download music videos, movie trailers, and game trailers.
- More than 65 percent of connected consoles have downloaded Xbox Live Arcade titles.
- There have been more than 8 million Xbox Live Arcade downloads since launch.

Good Numbers.

Check out the story on Xbox dot com via Kotaku