I created a Fitbit group for S16. It's by invite only, so if you're interested in joining, PM your email address to me and I'll add you. Please specify that you're in S16, because I've got one going to August, too. If you want to join both, let me know.
If you don't know how to PM, click on my name (imakeeff0rts), and a option to Private Message will show up on my profile. If you still can't figure it out, or the option isn't there, let me know and I'll message you.