It looks like this is missing one of the (IMO) most useful pieces of Processing, though: the "one click to run" IDE. Processing is pretty much the only environment around that you can download, open, type in a few lines of code, and have an OpenGL accelerated graphical program running without any sort of configuration or installation, and (again, IMO) this is one of the most compelling things about it, especially for beginners. That would be particularly nice for iPhone, especially since XCode sucks so hard, but I can't be too greedy - I realize that getting things to build for iPhone is a nasty process that essentially must go through XCode, so perhaps there's nothing that can be done.
Even just as a library Processing is quite useful, filling in all of those simple graphical things that intuitively feel like they "should" be in any language by default (line drawing, fills, etc., and especially all the annoying graphical setup and keeping frame rates steady), so I'll definitely be checking this out.
That's kind of weird: serendipity made it so that I ended up going back to Processing.org just last night and was wondering on my way to work if there was a way to make iPhone apps with Processing. I guess there is.
(serendipity went like so: a colleague had a stone carving class, I looked at the association site, which had electronic classes including about Arduino, which brought me to Arduino.cc, then to Processing.org because they're using the same base framework/IDE)
Alternatively, OpenFrameworks[1] (C++) targets the iPhone. I haven't used OF before, but I assume there's a speed/familiarity tradeoff here if you already know Processing.
Even just as a library Processing is quite useful, filling in all of those simple graphical things that intuitively feel like they "should" be in any language by default (line drawing, fills, etc., and especially all the annoying graphical setup and keeping frame rates steady), so I'll definitely be checking this out.