YouTube is one of the most easy and exciting ways for teens (and others) to publish, so it's no wonder that it has become the most popular place for Builder Buddies players to communicate. Look for role play adventures, music videos, news, and game play techniques. Some of the top channels are below. However feel free to simply search for "Builder Buddes" in YouTube to find all kinds of popular videos!
You can use SimpleSite or Weebly to quickly create a free website for your town. And, of course, in addition to these town websites, you're currently in the Builder Buddies section of the Geek Pocket Minecraft Website which is hopefully giving you a treasure chest of information supporting the game!
For some reason, the game creator Xavier Robledo has favored Instagram as the primary way of publishing official news updates for the game. He does have a website and online help also, but both of those are not kept up to date. Note that with Instagram, it is pretty easy to take a screenshot then publish it to your Instagram feed.