Mention using weave remotely in readme

README.md

@@ -36,6 +36,9 @@ Ensure you are running Linux (kernel 3.5 or later) and have Docker
 
 CoreOS users see [here](https://github.com/fintanr/weave-gs/blob/master/coreos-simple/user-data) for an example of installing weave using cloud-config.
 
+Weave respects the environment variable `DOCKER_HOST`, so you can run
+it locally to control a weave network on a remote host.
+
 ## Quick Start Screencast
 
 <a href="http://youtu.be/k6r7yuSr0hE" alt="Click to watch the screencast" target="_blank">