There is a thread on the Fire TV Stick here:
Despite ordering the morning of the announcement, we couldn’t get our test unit on release day, so we will finally be receiving one later today. If there is an path that we can execute without an official API, we’ll certainly be looking at that.
Google TV has a thread in the Feature Requests forum. At this point, because the product is dead from a Google perspective, we’d recommend infrared control for Google TV as it is fairly unlikely we’d go back to add that.