Images: TV networks, sponsors get creative

ABC's "Lost" rewards viewers who stay tuned during commercial breaks with "ads" that lead to the "Hanso Foundation," a Web site for a fictitious research foundation that gives clues to the show's story line.

Viewers who find their way to the Hanso Foundation's Web site are rewarded with more clues to the events on ABC's "Lost" and "Lost Experience."

NBC's "The Office" airs humorous (but fake) public-service announcements featuring its lead actors. The PSAs mimic NBC's "The More You Know" PSA campaign.

"The Courier," an action-genre "micro-series," was sponsored by Pontiac and aired during commercial breaks in January on CBS.

"Gold Rush," an online reality game from AOL and Mark Burnett Productions, will help lead people to clues about CBS programs and commercials scheduled to air this September. The prize is $2 million in gold.