He proclaimed himself as messenger, which got himself killed. Famous for his "Mathematic Miracle of The Qur'an" which focuses on patterns with the number 19. He had to lob off the last two verses of surah At-Tawba (9, which he calls Al-Bara'a), calling them forged, to make his 'miracle' work.
There's was one of the first sites I seen when I converted, and even then I knew they were kinda kooky.
http://www.submission.org/ They used to have this great question and answer section (I couldn't find it again in a cursory overview), which had some unintentionally funny material. They make Salah in English IIRC.