In reply to stp:
This was the second edition of the Sisu Masters. In 2013 the athletes were:
Nalle Hukkataival, Kilian Fischhuber, Andy Gullsten, Dave Graham
Anna Stöhr, Anna Laitinen, Melissa Le Nevé, Eevi Jaakkola
The format is not 100% set in stone as it's mostly about creating a nice "bouldering jam" and the US vs. Finland happened more or less by coincidence.