And who's to say that your forum server (for example) is just as secure? That could be a foothold into your environment too. And let's not forget social manipulation of your staff and users. Maybe I'll just steal the machine in question, or your laptop.
After I try all those avenues, I'm either finding another target or ramping up for a protracted attack on your SSL connections.
If your site attracts this dedicated of an attack, you'd better get that high paid security consultant. ;)