The only publisher currently is P3 Interactive for Europe. I'm afraid there is no release for the UK, US or Aus at this point (other than imports) - I will ask 3D People for more info on other regions but don't expect any quick releases in other regions.

I'm not sure how much weight to give the editor - I have played a preview version, which didn't include the editor (to my knowledge) and I have interviewed 3D People and iHobo who didn't raise it at all - I suspect it's not really a major feature but I stand to be corrected.

You can find my hands-on preview here, which may be useful for the general gameplay:

Stuff @ RPGWatch