I can't follow the links at work, so I don't know what all of the suggestions are. But I do know what she's after :D
Things that float my boat in this area are:
The first two Led Zeppelin albums, and the original Howlin Wolf, John Lee Hooker, and Muddy Waters stuff they were influenced by. Good that she already knows about Howlin Wolf - he was the man :D
Also, the early ZZ Top stuff (ignore everything post-Eliminator from this "dirty blues" point of view - you want the raw stuff off the first few albums).
Possibly she might like Rory Gallagher's approach as well - try Live in Europe and Irish Tour as starting places.
Oh yeah, and early Fleetwood Mac.
And there's a girl that's making music at the moment, plays a tele - she's fab, got her album, can't remember her name, curses.... she'd love that (you'll have to get a humbucker in the neck of her tele if you let hear that girl though!)
EDIT: I think the album might be called White Sugar - can't remember the girl's name though...