Regarding that civic GX... I just recently read an article that said Honda is working with a company (forget the name for the moment) on a home-refueling solution that hooks up to your home's natural gas line.
I'll see if I can dig up that link in the mean time
[EDIT] Here we go:
http://www.canada.com/search/story.a...c-2c3b45f87ddc
http://www.canada.com/search/story.a...9-fee887c05135