You should really kick in for some decent web hosting for your church website, but if your parish is strapped then here are a few options in the news recently.
David Strom’s Web Informant discusses free hosting from Dreamhost (for non-profits) and Microsoft’s OfficeLive; some restrictions apply, of course. Wild Apricot has website and online administration tools for non-profits, including free options.
If you have any experience with any of these, do tell!