Transparent Blurry Billboards for Mustang (0)

A nice take on the transparent billboard variety: "Constructed from semi-transparent resin, the billboards accurately blur the scene behind them regardless of day, weather, or season."
-- Ian Hart

More transparency:
Transparent Billboard for DIY Stamps in Estonia
Transparent Billboards for Amnesty International
Transparent Billboard by Nike

A Whole Book of Cool Billboards and Guerrilla Stunts (0)

If you like the stuff you see on Billboardom and Adverlab, you will love this book. Advertising is Dead - Long Live Advertising is a richly illustrated, annotated and cleverly categorized compendium of untraditional advertising approaches.

"Police Car Cutouts" Billboard (0)

A very smart way to take advantage of a typical behavior: place a realistic-looking cut-out of a police car to slow the drivers down and read your billboard. This billboard for a Turkish bank reads, "Pay your traffic tickets on time without waiting in line - isbank.com.tr".
-- Frederik Samuel

Billboard and Photobooth Against Dandruff (0)

Two brilliant ideas for anti-dandruff shampoos. The billboard has little transparent notes that you yourself remove from the hair. The photobooth tricks you into taking a photo of your scalp. Simply brilliant.
-- Coloribus

Giant Racket-Trampoline Promotes Tennis Cup (0)

An installation in China to promote a tennis competition consists of a giant racket with trampoline functionality and a guy jumping up and down. The copy reads:
"The fastest server generate over 560 Newtons. Enough force to propel a human skywards.
Experience the best tennis at the tennis masters cup 2006".
-- via Ads of the World