Facebook Inc. Paying US$19 billion for WhatsApp
Subjects you can easily integrate this into:
Talk about how the selling price of WhatsApp compares to that of YouTube? What differences exist and why?
What skills did this entrepreneur/team of entrepreneurs need in order to build such a project?
If the owner of WhatsApp took the money made from selling the application and invested it into a bank savings account with a rate of return of 1% compounded annually, how much will they make if left untouched for ten years?
Find statistics on how fast people started downloading WhatsApp and graph the data - is it linear, quadratic, exponential or other? Is this what you would expect?