Did mine last Nov. Front seal, cam seals, TB, WP, Thermostat, all belts and all hoses (the ones on the oil cooler are a pain). I got all my stuff from Track Dog (sponsored Miatas @ Hallett) with quick shipping.
This video was helpful, takes the guess work out of getting it right. http://www.youtube.com/watch?v=fm1pU...ature=youtu.be
Also get Turner's Performance Projects book. And Miata.net.
Might as well do an oil change and replace the plugs and wires at the same time.