I really rec the Yoga Journal podcasts taught by Jason Crandell for anyone who's interested; they're definitely Iyengar-flavoured, with lots of emphasis on precise alignment and little adjustments that somehow change the underlying emphasis of a pose completely.

I got a huge amount out of going to an Iyengar class in RL (I eventually had to give it up because it clashed with medical stuff I couldn't re-schedule). It'd take two bricks and a foam block and five minutes of setting up to do a pose I'd normally do in a second with no props -- and somehow it'd be far harder and at the same time I'd feel I was understanding the pose far more deeply. Really hard work.