I just signed up for 2013.
This is my fifth Nano in a row. I had only just begun to write when I started my first on in 2008. When I finished that one, I had 51,000 words of garbage. I tried to rewrite it a year ago and got bogged down trying to stay in-sync with what I had written before, but that was way too hard. I just completely started over. 60K words later I got bogged down again. I'll probably start that one over again, someday....
This year I'm basing the novel on a short story I wrote during the summer about the Pig-Frog, or Pariah. I've been world building the heck out of it, (A lot different than my first Nano, when I essentially had an idea of how I wanted to start it and ran with it.)
I have a good idea of how the story will go through the first half and most of the events toward the end, but I need to work out a little more conflict and a twist or two. There is a blerb and a piece of the short story on my Nanowrimo site.
If you do Nanowrimo, too. Let me know so we can be writing buddies.
My site is: http://nanowrimo.org/participants/norvaljoe