Hi, John,
I walked the Norte last summer and am one of the people who posted here about my stops along the way. Though my stops list many non-albergue stops, in most cases there was an albergue alternative in a nearby town, but we just decided to stay in private accommodations, either because it fit better with our walking schedule, or we wanted to stay in a bigger town or a prettier town or something like that. We met people who almost never stayed in anything but an albergue, it can be done with careful planning. I think the links Sil gave you will give you most of the details, but there are always new ones opening that the websites might miss. For instance, I just checked and saw that Mundicaminio does not have a listing for the new albergue in Comillas. It is terrific and not to be missed. Nor can I find another new albergue in a town a good day's walk before Vilalba (name escapes me) that was opening a couple of weeks after I passed through in May 2007. We always found that the people in the albergues themselves (both the hospitaleros and the other pilgrims) had plenty of up to date information, so I think that you will be able to adjust your plans to take advantage of albergue accommodation in most places.
Laurie