Using the #+BEGIN_SRC <mode-name> tag will also allow you to edit any code snippet in its own major mode.
#+begin_src lisp
(defun botsbuildbots () (botsbuildbots))
#+end_src
With org-babel enabled, you can actually run this code, or use it in literate-programming style to write programs.
This is really nice for writing code example.
(Me, I just use Dropbox and vimwiki, and occasionally push it to a private Hg repo on BitBucket.)
Your favored tool is really not that special. Sorry. =)
Read the entire manual to understand Org mode's power. It has no equivalent that I know of, and I searched thoroughly before giving up and learning Emacs.
From what I've seen, vim people generally are not really interested in creating enormous extensions as the emacs people are, so if they actually created something similar in power and complexity, I would be really surprised and impressed.
But after using VimOrganizer and looking at vim-orgmode (both of which claim to be replacements), I'd just as soon settle for something else.
But its essence is actually quite simple: it's a toolbox for all things text. Not a _tool_, mind you; a toolbox. It _contains_ tools. Lots and lots of them. Oh, and it has funny keyboard shortcuts.
So here is Emacs in a nutshell:
1. "find-file" is a function;
2. you can "M-x any-function" to invoke it;
3. you can assign a shortcut like "C-x C-f" to any function;
4. you can define your own functions in the same language Emacs itself is written (i.e., you can really extend Emacs, not only call some simpleton API);
5. you customize Emacs' settings and behaviors by changing some variables ("please highlight the line the point is currently on").
That's pretty much it. Yes, there is a mountain of functions and variables and modes that are complicated and interconnected and you _will_ spend some time configuring everything. But the gist, the essence, the core -- that's it. You've already grokked Emacs. Now you can learn one function at a time and extend your knowledge of it little by little. It doesn't have to be more complicated than that.
The modes? Well, remember, Emacs is a toolbox. Each mode is a tool, specialized in some area of the Great Forest of Text Editing. There's a mode that will help you save keystrokes (yasnippet); there's a mode that will help you write code in the language X (x-mode); there's a mode that will help you open files and buffers easily (ido, anything); there's a mode that will help you with your todos and prose-like text (org-mode).
Regarding org-mode specifically: you can spend weeks using only ONE shortcut, Shift-TAB, and already it will be extremely useful. Then you'll wish for some feature (like adding tags to headlines), and you'll find that it's already implemented. And that pattern will repeat, and repeat, and soon you'll be using lots of advanced features, and you won't even notice, because it'll have become a natural thing.
I hope this makes sense. And, just to be clear: I know a size does not fit all. I did not write this to say "everyone should like Emacs, look, I proved it". This is just my experience with it. I hope it's useful to someone.
You can point it to an .org file on Dropbox or on your own server.
There is an Android port (https://github.com/matburt/mobileorg-android/wiki/) that is nearly identical to the iOS version as far as I can tell from using them both.
http://orgmode.org/
Of course not being an emacs user may make editing org mode files a little difficult. However, any system will do as long as its consistent. If not org-mode; txt2tags, markdown, etc can also serve in a pinch.
I think plain text is the de-facto universal format. There's also no restriction on presentation and interface. Your choice of tools are pretty wide open with plain text.