I wouldn’t want to work at a place where I would have to be paranoid of all my co-workers or everyone I came into contact with at my work (that knows I have an iphone). Unless everyone at this office uses an iphone and there’s just loads of proprietary industry secrets in them I don’t think many people should have a whole lot to worry about.
Imagine the health care information for people who receive their email on their iphones. Or people in HR. Payroll departments. I’d guess a lot of business executives have information on their iphone that needs to be kept secure. This is a big hole.