The 4.4 Preliminary Patch Notes have been put online. It looks like we will just be getting a new flowerpot seed (Arum Bulb).
I have created a Topsoil Analysis page that will present data collected from the community in regards to topsoil cross percentages.
I have added a Dead Crosses page to the site. It will list all of the currently known combination of seeds that do not yield any seeds. The main use for this will be as a reference for when a new crossbred seed is added in future patches.