My church uses Joomla on Godaddy.com. I played around with Joomla a little last night on my own site but I myself wasn't too fond of it. I don't tend to do too well with applications like that myself though. If you know what you are doing or can find tutorials it is probably a breeze though. Joomla is open-source as well so that means it is free and has plugins out the ears.
I don't know where my old church does it's hosting but they use a service called
Church Web Works. It seems fairly easy to use but it also has rather high monthly fees though.