EMT... err... flex??? Not sure what the difference is.
So, how about this: It is orange Carlon Conduit that I picked up at Smart Home. The plastic corrugated stuff designed for low voltage pulls.
One bend is fairly tight as it is between the ceiling and the wall, but not terribly tight. Perhaps a 8 inch radius? My photos show that it is at the very least a 8" radius, perhaps wider. So, pretty good to pull through.
Still a big market for the first guys who want to make that first mini-HDMI connection and include a mini to full size adapter in the box. Or a DIY HDMI end. Not necessarily a full 'crimp' type connection, but something proprietary would work.
Just throwing out my million dollar ideas so I can get a freakin' solution that someone should have marketed already.