Skycon Talk?

Laura has put a gun to my head.
I have to decide on a topic for my talk at Skycon and I’ve got about 24 hours to do it.
For once I won’t be the only representative from Blacknight presenting!! Paul, in a possible moment of madness, also agreed to give a talk.
As he’s a hardcore geek he’ll probably be right at home, whereas I’m a little more wary.
What should I give a talk on??
Bearing in mind that it’s quite a technical conference, judging by the timetable, what would people recommend?
I was contemplating doing something on email filtering. (The last talk I gave in UL was on SEO)
Any thoughts?