As there are other interpreted languages now on iOS, such as Lua, various Basics, etc. I would love to see a version of Regina on iOS! It would be quite dynamite!
I have built a version Regina for iOS; an iPad only app at this stage, but I did it when I was employed and used my employer's iOS developer licence. I've now been made redundant and I no longer have access to the developer licence and without a job I can't really justify the expense of a developer's license :-(
The app was a port of Rexx/Runner.
This has now progressed courtesy of Net`Q. I hope to have an official release on iTunes of "Rexx Runner" in the next couple of months.