Lets you use a VR world space cursor with World Space Canvases in Unity3D 4.6. Add this to the EventSystem object. Put some box colliders on your buttons in the World Space Canvas. Then, do a trace to see if you're looking at a menu object--if the trace hits one of those buttons, pass it to SetTargetObject. See ralphbarbagallo.com for a longer e…

VRInputModule.cs

using UnityEngine;
using UnityEngine.EventSystems;

//by Ralph Barbagallo
//www.flarb.com
//www.ralphbarbagallo.com
//@flarb

public class VRInputModule : BaseInputModule {

	public static GameObject targetObject;

	static VRInputModule _singleton;

	void Awake() {
		_singleton = this;
	}
	
	public override void Process()
	{
		if (targetObject == null)
			return;

		if (InputManager.press) { //I poll my own inputmanager class to see if the select button has been pressed

			//We tapped the select button so SUBMIT (not select).
			BaseEventData data = GetBaseEventData();
			data.selectedObject = targetObject;
			ExecuteEvents.Execute(targetObject, data, ExecuteEvents.submitHandler);
		}
	}

	public override bool IsPointerOverEventSystemObject (int pointerId)
	{
		if (targetObject != null)
			return true;

		return false;
	}

	public static void SetTargetObject(GameObject obj) {

		//we're hovering over a new object, so unhover the current one
		if ((targetObject != null) && (targetObject != obj)) {
			PointerEventData pEvent = new PointerEventData(_singleton.eventSystem);
			pEvent.worldPosition = FlarbCrosshair3D.GetRaycastStart();
			ExecuteEvents.Execute(targetObject, pEvent, ExecuteEvents.pointerExitHandler);
		}

		if (obj != null) {

			//this is the same object that was hovered last time, so bail
			if (obj == targetObject)
				return;

			//we've entered a new GUI object, so excute that event to highlight it
			PointerEventData pEvent = new PointerEventData(_singleton.eventSystem);
			pEvent.pointerEnter = obj;
			pEvent.worldPosition = FlarbCrosshair3D.GetRaycastStart();

			ExecuteEvents.Execute(obj, pEvent, ExecuteEvents.pointerEnterHandler);
		}

		targetObject = obj;
	}
}