Worried about protein and nutrients

Does anyone know how much protein you should have per day???? I have been eating a vegan diet for a couple of weeks straight now and I'm feeling really great but I know I'm not eating very much protein. Does anyone have simple high protein vegan recipes (wow that was specific). I don't know how credible this particular source is but I have been finding a lot of article along the same lines as this one http://chetday.com/strictvegandiet.htm. I have also found articles opposite on websites that promote veganism, so thats kind of biased. Has anyone found any clinical evidence that veganism can cause nutritional deficiencies???