We use Constant Contact. It works for most our needs, gives us a bit of flexibility. It's not a great tool, but it's functional.

I think this is right on. If the sign reflects the spirit of the church, this makes a lot of sense to me. If it's simply an effort to post a catchy sign and downplay a social media tool, it doesn't much work for me. There are plenty of things out there that churches can promote.