There's a fair amount of standard rep in the latter volumes of the Parkening and Noad books. My professor had me pick up this collection of Villa Lobos works. No complaints there. He also had me pick up this collection. I was a little skeptical about the title, but it definitely delivered. I've used both quite a bit in picking out rep for my junior and senior recital. For anything else, I went to the Icelandic guitar school website.

edit: formatting