<p>I know if I comment after someone, or after their answer or their question, then they will be notified.  But is there are more general way to attract people's attention?  For example (hope he doesn't mind, but he's a mod :-) ) if I do @whuber will that now attract his attention?  Would this work in chat?</p>

<p>For example, sometimes one sees a question that you'd like to flag up for another user (perhaps because you've seen them giving good similar answers before).  I'm digging through some old questions...</p>
