From ChasingTheFrog.com :

Did Al Pacino's character, Lefty Ruggiero, really get whacked as the end of the film implies?

No, he did not get whacked. Benjamin 'Lefty' Ruggerio was picked up by FBI agents as he left his apartment on August 30, 1981. As a result of Pistone's work, Ruggerio was sentenced to serve twenty years in prison. In the early 1990's, he was released from prison, and on Thanksgiving Day, 1995, at age 72, he died of cancer in his New York home.

"Growing up my dad was like 'You have a great last name, Galifianakis. Galifianakis...begins with a gal...and ends with a kiss...' I'm like that's great dad, can we get it changed to 'Galifianafuck' please?" -- Zach Galifianakis