Add/update some README.md's.

examples/moterm_example_app/README.md

 # Moterm example application
 
 `moterm_example_app` is an example application that embeds
 [Moterm](../../apps/moterm), uses it to provide a prompt, and allows it to be
-connected to other applications (which should implement the
-`mojo.terminal.TerminalClient` interface).
+connected to other applications (which should provide the
+`mojo.terminal.TerminalClient` service).
 
 ## Running
 
 On Linux, run it in the usual way, e.g.:
 
     $ mojo/devtools/common/mojo_run --enable-multiprocess "mojo:window_manager mojo:moterm_example_app"
 
 You'll probably need to click on the window to give it keyboard focus. You may
 also want to resize the window (especially horizontally) to make it bigger.
 
-At the `:)` prompt, you may enter the URL for any application implementing the
-`mojo.terminal.TerminalClient` interface. E.g.:
+At the `:)` prompt, you may enter the URL for any application providing the
+`mojo.terminal.TerminalClient` service.
+
+### Example 1: Dart netcat
+
+An example of a terminal client application written in Dart is `dart_netcat`:
 
     :) mojo:dart_netcat
 
 At this point, the terminal's input/output is transferred to the specified
 application. In this case, it just outputs a help message and closes the
 terminal, returning you to the `:)` prompt. You may also try:
 
     :) mojo:dart_netcat?localhost&port=80
 
 In this case, `mojo:dart_netcat` will make a TCP connection to the specified
 host/port. Assuming you have a web server running on your machine, you may try
 entering:
 
     GET /
 
 (It's probably a bug in `mojo:dart_netcat` that it doesn't close the terminal
 "file". You can press Control-D to return to the `:)` prompt. The unhandled Dart
 exception after you press Control-D is definitely a bug.)
 
-Another example you may try is:
+### Example 2: Running native console applications
+
+The `native_support` service supports running native (Linux) applications. The
+`native_run_app` application provides a terminal client front-end:
+
+    :) mojo:native_run_app
+
+At its `>>>` prompt, you can enter name of a native application. E.g.:
+
+    >>> bash
+    $ echo hello linux
+    hello linux
+    $
+
+### Example 3: JavaScript REPL
+
+A terminal client application (written in JavaScript, using the JavaScript
+content handler) that provides a JavaScript REPL:
 
     :) file:///path/to/src/examples/js/repl.js
 
 At its `>` prompt, you can enter JavaScript expressions. E.g.:
 
     > function add(x, y) { return x + y; }
     undefined
     > add("hello ", 123)
     "hello 123"
+    >
 
 ## See also
 
 * [//apps/moterm](../../apps/moterm)
 * [//examples/dart/netcat](../dart/netcat)
+* [//examples/native_run_app](../native_run_app)
 * [//examples/js/repl.js](../js/repl.js)