Well, we posted about this story before – Legionella bacteria popped up at a party at the playboy mansion in February. And now apparently the source of the Legionella bacteria has been traced to … hot tubs (see Playboy Mansion illness traced to hot tub bacteria – Yahoo! News). Also of note – the epidemiologists used Social Media to contact the conference attendees. Not sure why – you would think Playboy would have a list somewhere. Anyway – studies of microbes in water systems or other very wet places (e.g., shower heads) are getting more attention these days.