When the scheduled session of Twitter for Business reached capacity at SxSW09, about 50 of us gathered nearby in an open area and had our own impromptu session where @lalunablanca's camera was passed around and participants shot whatever photo they wanted to from their perspective. All photos are uncropped and are "as shot". Impromptu session was on Twitter for Business. At the end, the hashtag #tweethall was coined and we all agreed to tweet it to find each other.