Did a quick little snoop around and it turns out that the warhammer font is Dominican with some added dice symbols.
You can find the font here: http://www.dafont.com/dominican.font and its best of all... Free.
The FFG inhouse version has the different dice symbols added to it, they are as follows.
Exertion = Ω.
¡ = hour glass (note that this is not the lower caps i)
Challenge = º
Boon = ¬
bane = √
die 8 = Π
Conservative/die 10 = «
Square/expertise die = Δ
Sigmar’s Comet = ƒ symbol
Success = æ symbol
Success, Righteous = ø symbol
I'll add these symbols to the font over christmas so we can have a version to use for ourselves, do you mind this FFG? Dominican being a freefont and all?