Here's hoping an editor also comes out for PS. Unfortunately, I find that very unlikely.
Having emulated rpg-maker titles on some consoles, I'm not sure how useful that would actually be. Console-based level-editors/game-makers tend to end up as a very slow, awkward way to reorder existing game content; it sounds like a lot of work for very little gain, although this is only half-educated guesswork.
^ Well, you can attach a keyboard and mouse to the PS3, so the only differences would be in file management (that could be handled by the editor itself) and the ways to gather artwork for your level. But yeah, probably too much effort unless they think they can monetize it via the store.
Its unlikely that there will be a PS version of the editor.
I was going to put these under a spoiler, but they're kind of compact because of the way the forum handles quotes, is that too long for a quote list or no?
Anyway, I don't really see why it wouldn't be possible to have an editor on the PS3 version of the game. I'm not sure how different the PS3 code is compared to the PC version, so if it would require being recoded from scratch then yeah, I can see how that would be a problem, but otherwise the fact that you have two controls sticks, a directional pad, and shoulder buttons for quick array swapping, control wouldn't be an issue as long as it was well thought through.
The biggest problem would be custom content and sharing. I'm not sure if it's possible since I've never seen a game do it, but since games can write .PNG files there's a small chance they might be able to read them too, which is obviously a way to handle custom tile set support, but also a possible way to import/export levels (A game called Voxatron (or was it Voxeltron?) managed to save 3D voxel-based worlds as photo files with long bar codes to represent all the in game data, and also have a cool thumbnail on every one).
I mean you could also just put up a server for levels, but that sounds really expensive and not worth it.
If you can figure out a good way to do sharing I think a PS3 editor is completely in the realms of
possibility doablility.