You realize that there is a niche of academia that works on using computers for analysis of writing samples in order to determine probable authorship, right? Algorithms exist that have been tweaked and improved over the years that you might be interested in reading about.

You might also connect with the people who try to identify students who turn in term papers and lab reports written by other people.

You could also add a game (who wrote the following paragraph? (Multiple choice)). That would be an avenue for return visitors.

You could also have "write like Hemingway / Dickens / Neal Stephenson / etc." contests. Kinda like painters going to famous museums and copying the works of famous painters, it's a way to extend and hone the craft of writing. I recall a good version of Twas The Night Before Christmas written as if Hemingway wrote it. Also, connect with specific writers' fanbases (especially Chuck Palahniuk), and with writers workshops, and fanfic groups. Poetry, too.

There are a lot of ways you could take this. Make sure your algorithm is effective, though!

Yes, I even have been contacted by people who research this, and received a lot of pointers to interesting works. But I'm sure I wouldn't be able to integrate and figure out this in 3 days.

You suggestions are helpful. Now that I'm interested in this topic, I may release something better. Thanks.

Have you thought about using the tournament algorithm to improve accuracy?

Not yet, but thanks for the pointer.