I don't recommend you give up Facebook, because we can use it to reach those friends and family who still need to be educated about Islam (here is how to use it for that purpose).
But for mutual support, for insider news, for sharing with each other good links, articles, and arguments — and for launching coordinated actions — Infidels United is helpful. All of us should sign up and get our fellow counterjihad friends to sign up too. You can use an alias freely at Infidels United, unlike Facebook. The creator of the site understands the danger of our work and respects our need for anonymity.
When coordinated action needs to be taken, it would be helpful to have a central communications hub where the message can get to everyone. Infidels United fits the bill.