Hey mikekchar,
I haven't heard of salt lassi. After some googling, I can confirm the recipe looks the same. But the appearance is oddly not similar. Maybe it is because of the type of yogurt those recipes used. But in the end they are both tangy, salty, runny but with some body, cold and refreshing goodness!
In fact, I am writing this while I drink ice cold ayran with meatballs in this winter day.
By the way, adding some milk seems to be improving the taste quite a lot. I used 1 part yogurt, 0.9 part water, 0.3 part milk for this one.