Beneaththeneon.com is the website of Matthew O'Brien, a journalist who's lived in Las Vegas since 1997. Matt is the author of Beneath the Neon: Life and Death in the Tunnels of Las Vegas and My Week at the Blue Angel: And Other Stories from the Storm Drains, Strip Clubs, and Trailer Parks of Las Vegas. He's also the founder of the community project Shine a Light.
The Sun piece
The U.K. newspaper the Sun also published a piece on the tunnels: