Nice work jumping into the React event subsystem.

We'd still like to support IE8 if possible. Fortunately, our synthetic event system means that we can use keyUp and click to simulate onInput in older browsers such that it works as expected.

However, since users won't expect onInput to work in IE8 anyway, I wonder if it's worth building this into the event plugin.

@jordow -- what do you think? Should we simulate onInput using keyUp and click in some event plugin? I *think* I'm in favor of it.