There is not, as of patch "Irritated Koala" (5/12/13, 12/5/13 US), a way to rebind keys within the game itself. However, [AutoHotKey][1] can let you rebind whatever keys you want. (It's also nice for rapid clicking on that dang craft button)
Key binding is a planned feature, but this is still early beta, and the devs have a multitude of other stuff to do too. [1]: http://www.autohotkey.com/