Well, I'm at over 28k. As long as I keep putting out 2500 words per day, I'll hit 50 by the final day. I want to write more than that but it's just not coming out as fast as I want it to.
Still, I'm happy with what I've done so far and what I've got planned. I ironed out a few plot wrinkles today and I know the story has enough legs to go 70-80k at least. As long as I've got the juice to take that far, that is. August is going to come really fast if I'm still working on this beyond July 15th.