LOL! Saw that on another church sign on a different forum/funny pictures site (can't remember where). Surely they can think of different slogans without ripping each other off!
Some classics include :
"CH CH. What's missing? U R!"
"Pray now to avoid the Christmas/Easter rush." (something along those lines)
I had a few others in mind, but I forgot. There's a website somewhere that lists them, but I lost the URL. Curse my bad memory.
http://www.reverendfun.com/ is quite an amusing site if you're into Christian oriented cartoons.