In the interest of attaching things to other things, today we printed briscoe28's s-caribiner from Thingiverse. It's interesting how the flexible bit works; this is a very nice design, which I guess is why it was a "Featured Thing" on Thingiverse today!
Thingiverse link: http://www.thingiverse.com/make:52773
Settings: Afinia low/.3mm in just over 10 minutes.
UPDATE: While it seems as if it would be fairly sturdy for normal light use, this *will* break if you fiddle with it too much. Wondering if printing at 200% would make it sturdier...