Yes, I'll be attempting NaNoWriMo this year. I have no idea how far I will get, but knowing me something will show up in real life to distract me and then I won't be able to get my motivation back XD
As for what I'm writing, I've got something in mind. Originally, I was going to write something completely new, but on second thought I'm going to continue working on a choose-your-own-adventure story I was in the process of writing called Apprentice. I've only written about six or seven pages - I'm not far into it at all - so I don't consider it cheating. The real advantage here is that because CYOA stories have multiple paths the word count will probably be easier to reach, as instead of having to come up with ideas and flesh out one storyline I can spread myself among multiple storylines.