Can you recommend any good resources for learning 3D-oriented maths? I took linear algebra back in college but definitely think I'll need some refreshers, as it's been a while.
Is pretty good and complete. The first chapter is a review of vector and matrices and the rest of the book is pretty solid. It includes pretty much every math concept you will need to implement what he has on this list and more.
Some interactive matrix maths lessons: http://www.intmath.com/matrices-determinants/matrix-determin...
Free textbook on linear Algebra: http://linear.ups.edu/
and for the intrepid soul actually implementing a viewport: http://zach.in.tu-clausthal.de/teaching/cg_literatur/lightho...
Good luck ;)