Here are some pictures as project 2 nears it's completion. 100kw array. This is a gold rated LEED rated building completed in 2003. Because it was built using daylighting techniques, the roof faces the perfect direction. Standing seam is a great basis for a racking system too. I built (and own) a 200kw array also.
https://picasaweb.google.com/107471...&authkey=Gv1sRgCOL6-IL5oI-RKQ&feat=directlink
https://picasaweb.google.com/107471...&authkey=Gv1sRgCOL6-IL5oI-RKQ&feat=directlink