I'm interested to see how Steve does with his 30 days of low fat raw vegan. I've been vegetarian/vegan for over 20 years, and have tried out 80-10-10 quite a bit in the last year. I definitely feel better following 811 than any other way of eating, but emotional & social issues get in the way sometimes.
Anyhow, as for the question of Vitamin B12, the best article I've read on it is a fairly recent one, from Dr. John McDougall, who's well-respected in the low fat vegan community:
The McDougall Newsletter - Vitamin B12 Deficiency, The Meat Eaters' Last Stand