Just wanted to let users know of something surprising I found: PS Touch does let you work with (I'm assuming supported) RAW files, though it's rudimentary (i.e., you can import and that's it; no Camera Raw features or anything like that). I know Fujifilm's RAF files work; I would imagine other supported RAW file formats would as well.
You must use Creative Cloud to do so, which is free to join. (2 GB initially; 20 GB if subscribed.) All you have to do is upload your RAW images as they are to Creative Cloud and then add the images from CC as you would any other image in PS Touch.
Just a heads-up.