Arlo is Woody Guthrie's eldest boy. You remember Woody Guthrie? Wrote "This Land is Your Land", "Bound for Glory", "Pretty Boy Floyd", and a whole slew of other classic folk songs.
Arlo performs in the same tradition, but a bit different style. He is best know for a more "Talkin Blues" approach and comedic presentation.
Here is the song he is probably best known for, performed by him at the Guthrie Center in 2005: