The latest version of Pages (version 6.1) and iBooks Author (version 2.0) include support for LaTeX and MathML, this is an interesting addition that will be of interest for many scientists
LaTeX is a high-quality typesetting system; it includes features designed for the production of technical and scientific documentation. LaTeX is the de facto standard for the communication and publication of scientific documents.
I've had a quick look at it here.
There is a listing of software reviews here.