The core FuelPHP team is fairly active on Twitter and can be found at https://twitter.com/FuelPHP. This is a great way of publicizing applications you've built, as they will often retweet you to their followers.

Although not as active as the FuelPHP forums or Twitter, the FuelPHP Facebook page at https://www.facebook.com/pages/FuelPHP/120778634657454 is monitored and all questions do get answered.