Nancy White roots-oriented? Oh, right...her hair... Seriously, these things are of course silly when the criteria is so broad (see "song of the millennium" thread), but I think Alan Mills fits in well with the previous recipients, as a performer/collector.
"Lifetime achievement in service to folk"...I'd really have to vote for Tommy Douglas--he got us Medicare!--which has proably done more to preserve & maintain the (Canadian) folks that do the music thing, than any one actually involved in the music biz!
Bill