The following recommendations are from Vegan for Life which is a relatively new book written by two Vegan Rds.http://www.amazon.com/Vegan-Life-Everything-Healthy-Plant-Based/dp/0738214930/
Daily Intake: .9g per kilo of healthy body weight, .4g per pound of healthy body weight.
For strength atletes it is 1.3g - 1.8g per kilo of healthy body weight, .6g - .8g per pound of healthy body weight.
Endurance Athletes are between the two.
By healthy weight they mean anyone not carrying excess body fat. So, if you were wanting to lose fat you would want to use your target weight rather than your current weight.