To answer Anna's question - yes, writers can participate in the guessing. Obviously they will know their own stories <g>. I see our final answers/guesses posts looking something like this, and suppose Tank was the one who submitted these guesses:
"Once Upon a Time" by Writer #1 - Joe Doe
"Happily Every After" by Writer #2 - Mary Sue Smith
"Angst, Angst and More Angst" by Writer #3 - DramaQueen
"Smooches 'N Nothing Else" by Writer #4 - ClarkLuvsLois
"Everyone Dies and Jimmy Dies Twice After Lois Gets Her Hair Cut" by Writer #5 - Tank
Of course, these are all made up writers not real writers (well, I think Tank is pretty real, but I've never actually seen him so it's debatable), but it's just for demonstration. So you get the idea - obviously when you would enter the name of the writer of your own story - you would put your own name as your "guess".
Hope that helps. If not, let me know and I'll try to clear up any confusion.
Lynn