Despite launching a new website and proclaiming it’s filled with “hundreds of diverse minds rattling,” Campbell is still bleeding staff from what we hear. Multiple sources are now telling us that Michael McCallum (pictured), an interactive CD who’s worked on U.S. Navy and other accounts, has resigned and is headed for fellow Detroit shop Doner. Why are we getting this sense of deja vu? McCallum, who’s spent the last three years at C-E isn’t the only apparently leaving, though, from what spies are saying. We’re checking in on these others as well as with Doner to find out McCallum’s status.