I am preparing for today's crayfish special session at SICB, but this is too imporatant not to share immediately: marbled crayfish found in the wild in Sweden.
I will try to discover more details soon.
Update, 8 January 2013:
original press release from 5 December 2012. It describes the find of Marmorkrebs in the river “a few weeks ago,” so about November. That there are “several sizes” is suggestive of a population, but does not confirm it.
The map of Marmorkrebs introductions has been updated accordingly.