The SmartFactory has just published a little hack that suddenly makes my life much easier. Let me explain !
Maybe I'm a bit lazy, but I often don't log to a site unless I need to. This causes an obvious problem : if people send me Private Message, there is a good chance I won't see it right away. Since we live in an 'instantaneous society', I like to receive PM... instantaneously
So I did a little hack allowing users to get notified by mail whenever they receive a Private Message. Of course, this only applies to users who have selected the Email notification method.