Originally posted by Bramela 
I have a twin lens reflex "Ikoflex". Haven't used it in years. Thing is can 2-1/4 square neg film still be obtained?
Same film as is used in all other medium format cameras....good old 120 (or 220). Been around since 1901. Shoots twelve 6x6 exposures, or sixteen 6x4.5 exposures, or ten 6x7 exposures, or eight 6x9 exposures, etc etc.
When I was a kid I always wondered how the cameras managed to each and every time so perfectly line up the frame markings on the film with the area that would be exposed. Then one day it finally dawned on me that there are no frame markings on the film. When you remember that little fact, it is easy to see how one size film can take so many different sized negatives.
Yes there are still people who use TLRs (I'm one of them, and own four TLRs). And yes they are still made, although only on the extreme high-end and the extreme low-end of the price and quality scales.