Yes, to prevent colocation, you need to override the interceptor.
<standard-warning>Are you sure you want to override colocation? Colocated calls execute an order of magnitude faster.</standard-warning>
My EJB is a long term call (>5 seconds), so the cost of remoting is acceptable.
Yeah, I figured from the way you phrased your question you knew what you were doing, but I have to include the <standard-warning/> for others who read the thread ;)