I recemtly got a soft backpack carrier, and my cat likes it much better than her normal carrier. YMMV.
Then again, my wife has a sweatshirt with a built in cat pouch pocket that our cat likes napping in while we watch tv (and playing with the hood strings after the nap).
I have to take my little guy on a city bus to get him to his veterinarian. It seems like this thing might be a convenient (although absurd looking) method of transport.
I used to babysit for a family whose cat liked to snuggle inside the back of my jacket while I was wearing it. The waist was tight enough when I zipped it up to hold him in there like some sort of purring kidney belt. Our cats would NEVER EVER have put up with that.