I think we may need to make this an FAQ entry somewhere, but Thunt has already said that the update schedule will not be dropping to one comic per week. But you know, if you only want to look for new comics once per week, you could always just do that. It might be less frustrating for you.
I take it you don't read Order of the Stick? Even before Rich injured his hand, the comic update frequency was basically "whenever." He has other health issues, and he updates when he can. Sometimes it's a lot; sometimes it's not. If people want to read his story, they wait and let him write when he can. Probably you shouldn't start reading it, either, if update frequency is problematic to you. Still, it's a really good story. I don't love it as much as I do Goblins, but it's close.