Sixto Rodriguez. He is one of my favorite singers. He released two low selling folk albums and pretty much disappeared. Years later he discovered his albums were a HUGE success in South Africa. The film "Searching For Sugar Man" tells his incredible story.
Okay, you've done some research and determined that many people are using portable digital recorders like the Zoom H4n and Tascam DR100 to record the audio during DSLR video shoots. Now you need some real-world advice about using this equipment properly with external microphones, field mixers and clapper slates.