wandrinabout,
I don't have the FCTM with me (I'm away from home) but the method of having some crab and some slip in the flare and then straightening up when the first wheel touches was suggested for strong crosswinds.
I would imagine that the bank required would be very small if some crab was maintained.
The method of maintaining full crab angle into the flare and then straightening up with the wings level, as per the post by 777AV8R, is recommended for moderate crosswinds (20 or 25 kts depending on the variant).
The wing down method is discussed by Boeing for lighter crosswinds although I have spoken to many pilots that use this exclusively with no problem.
It seems to me that the touchdown geometry does allow a fairly wide margin for error using the wing down method. I will be interested to see how the 3 channel autoland handles crosswinds if we ever get the rudder channel installed.