Not to be too harsh, but I agree, this is hardly a "viable" product. It pretty much is a college-level assignment where you just graph data in a database. It's needs a lot more work before it becomes minimally "viable".

Why make people guess the names? Every name I picked seems to drop down dramatically, but if I want to find the most popular names, I have to guess it? Why not show the top 10 most popular names?

What about a logarithmic graph? If you graph "Isabella" or "David" next to any name, it renders the graph useless.