Question, I created a landing page in late december. Does that count for the challenge or does it have to be a new landing page? I've grown my list by more than double (had 92, now have 199).

You can, however only subscribers that have signed up after the challenge started will count! :) 

Hello, I am in the same boat. We have about 198 subscribers but this is an exciting challenge to push us to get the next 100. Go for it. I once heard that you should set your goals and then add a 0 to the end of them...it makes you really stretch. Good luck with the challenge. And way to go in getting 199. That's not a small feat.