Who plays George Stobbart?

Danny Trejo.

I was completely uninterested so far, but this will draw me in.

You'll never convince me that Domhnall Gleeson is NOT the guy to play George:

   

Good actor, the right looks (with a little blonde dye) and body type, and just the sort of innate "everyman" likeability that is needed for George, which you wouldn't get with more of a classical "movie star."

A Broken Sword movie wouldn't be a big budget production production anyway, so Gleeson is exactly the sort of actor you probably COULD get for the role.

As a bonus, if he took it, we might actually learn how to pronounce his name.

You know what, it took me a while but I see it now.

I hope they cast a French actress for Nico. How about Audrey Tautou?

edit: just looked her up - apparently she went into (semi-)retirement!