Harp: the new guitar
More singers and songwriters are discovering the harp as an accompaniment instrument. Dusty Strings has a nice article up on their site, along with some examples linked from YouTube.
My personal favorite singer/harpist is Christy-Lyn. (She also does splendid harp only pieces)
She has many more videos to explore online. She has been doing a series of live concerts via YouTube, and those are also available afterwards.
I am also a big fan of Erin Hill. She plays such a wild variety of music on her harp. From classical to David Bowie. Who would have thunk it? But it is great!