Mattisyahu article in NY Times, Dec 23, 2007
From my synagogue's email list, Steve Hassan posts:
The Hasidic reggae star Matisyahu, who said he felt “boxed in," For a Singer and a Sect: A Rift Amid the Riffs?, By Alex Mindlin, Dec 23, 2007.
The article describes the singer as having distanced himself from Lubavitch and davenning, instead, at Karlin. It doesn't mention why we haven't heard much from him since he abandoned the label, JDUB, on which he first became famous, for Sony a year or two ago. For background, see a link I posted last year.