We are getting a batch of production models shortly. We are then going to do as much rigorous testing as possible before we ship them to the public. April is still a great target and I (or Eric) will post a more precise date when can be certain to abide by it.
BTW, we will be teaching two classes at EH expo on the software for the MX900 and TX1000. Plan to attend the class if you are at the show (we have some fun swag for attendee's) and learn how to program these new controllers - then you'll be really prepared when they ship!

Jeff Wagner