I also must have swapped with someone.
What I now have/anyone missing this stuff?: A lot of brick (three stacks about), saplings, string, some cobble, sticks, a chest, all sorts of tools (including three cobble pick axes), ladders, torches
What I lost and would really like back: diamond pickaxe, some iron tools, lots of wood and cobble and dirt, seeds, arrows, bow, bucket full of water, sugar cane, torches, misc other things