I just came across this link from Spin Magazine about the studio that Justin Vernon (Bon Iver, Gayngs) and his team built in their home state of Wisconsin. Spin Magazine - In The Studio With Bon Iver
For those of you who don't know Bon Iver, the 2008 release "For Emma, Forever Ago" is truly spectacular. Stripped down, heartfelt and beautiful...a modern day classic. The most recent (June 2011) self-titled release "Bon Iver" is great as well but very different. The music has a much bigger and more polished feel but is nonetheless amazing.