I released 2 TB's last weekend. Their names are "Happy" and "Rock" They are, quite literally, these words, hand cut out of aluminium checkerplate. They were released in Gladstone, Queensland, Australia, with the mission of travelling to Gladstone, Missouri, USA, then returning via Gladstone New South Wales, Gladstone Tasmania, and Gladstone South Australia, with appropriate pictures taken.
In preparation for the mission, I Googled for other cities of Gladstone in the world, used the GC database to find the appropriate zip code for Gladstone Missouri, then searched for caches in that area, then contacted a cache owner in the area, listing the primary goal of the bugs, namely a certain photo. When they confirmed the ability to fulfill the primary goal, the mission was confirmed.
Just a bit of forethought and planning went into it.
Oh, and in case your wondering whats so specific about Gladstone.
Glad stone
Happy Rock
Cheers
Bundy