My own talk is "Time and Money"; both are pretty important concepts to have a handle on when you are in business, either as a freelancer or when starting or helping to start a bigger business. Even as an employee, these are really important concepts to understand; most of what I learned about business I learned working with business people in the jobs I had beforehand.
Time is important because we need to figure out how much we have and how to share it around. Money is important because we all like to get paid. I'll be sharing my own tactics for keeping both of them under control so I hope you'll join us!