Well it looks like Hell On Wheels is the first confirmed act for the Export Music Sweden showcase shows around SXSW. Just look at their updated tour schedule (incl. South American dates):
03/17 - Mercury Lounge, NY, NY
03/19 - Emo's, Austin, TX
03/21 - Trobadour, Los Angeles, CA
03/27 - Teatro Guararapes, Recife (BRA)
04/03 - SESC Pompeia - Chopperia, Sao Paolo (BRA)
04/04 - Atari Club, Sao Paolo (BRA)