Film.ick reports that 'trusted sources" have confirmed that Framestore CFC, an FX company in London, will be handling the computer special-effects for Two Face in The Dark Knight.
They are to begin work in November. The production house worked on the effects for Children of Men.
The significance of this revelation is that the character would not be an entirely make-up based look.
The site ponders that the only solid reasons why Batman's nemesis would need CG effects, is that certain mouth movements may not be possible with simply an actor, prosthetics and makeup ... or perhaps teeth showing through a wound.