Gladly, dear lady. The view he was Arian is not completely uncontroversial, but is held by the large majority of Newtonian scholars. Interestingly, much of the evidence for this was discovered by John Maynard Keynes, the economist, who acquired and studied Newton's private papers. The first link is the lecture Keynes prepared on Newton's tercentenary, one of the most remarkable lectures never given.
http://www-history.mcs.st-and.ac.uk/history/Extras/Keynes_Newton.html
http://www-history.mcs.st-and.ac.uk/history/Extras/Newton_Arian.html
http://en.wikipedia.org/wiki/Isaac_Newton's_religious_views
http://www.adherents.com/people/pn/Isaac_Newton.html and links therein
http://galileo.rice.edu/Catalog/NewFiles/newton.html
Appreciate you posting the links. I've printed out several pages for nightstand reading material. Newton is one of my favorites from Science History, but Feynman is the all-time favorite.
Thank you so much, HayekRocks, for the links re: Newton's theological views! Most valuable!