There's a huge one going on right now involving BAGS! Yes bags, purses etc. It's called the Carried Away Big Bag of Luck Giveaway.
It's basically a scavenger hunt and I just love scavenger hunts no matter how big or small. Each of the participating shops has one listing with either a Shamrock (see the huge graphic at the top of this post) in a picture or the words "Bag of Luck" in the listing description. To be eligible for the grand prize, which is your choice fo 6 of the prizes, you must find all 26 listings and send the urls in to the team.