On a personal note, my family uses the Quaker traditon of the familiar ratehr than the formal 'you' when referring to each other. It's a lovely tradtion which gives a feeling of closeness, intimacy, and unmistakable bond between family members. However, we don't use the nominative 'thou' at all, replacing it instead with the accusative 'thee', as (and I'm not sure when this change would have come about) 'thou' is regarded as archaic. People ask me about it all the time, but I've yet to find a really good answer.

-Jessica