I've been highly amused by the recent TV ad campaign for the Jamaican beer Red Strip. In particular, the two-minute-long "Infomercial" ad is great, especially how effectively it uses humor to drive traffic to the brand's web site. In the ad, when they run out of promotional Red Stripe items to hawk (a mini telescope, a bottle opener, a box of mints and a t-shirt), they propose auctioning off the character Jimmy's mustache and the other character's shoe. I see these items are now available on eBay (only hours left: bidding on the shoe is currently up to $55, while the mustache so far has fetched a top offer of $32.78).
All of the ads, including radio spots, are currently featured on the beer's web site. I'd highlight this campaign as one of the most innovative examples of cross-media marketing I've seen in a while.