Its definitely a good time to be a brewer or beer lover in MS, Crooked Letter is fully funded and has only a zoning hurdle to get passed to break ground and get started.
The other one you linked is fairly new, I have yet to talk with them about their plans but would love to.
On top of those you have Gordon Creek Brewing which is Sam Sorrels, the former brewer at the Keg & Barrel in Hattiesburg, he has his equipment and is dealing with zoning issues as well.
Lastly, there is the Old Abbeyville Brewery in Abbeyville, MS north of Oxford who is in planning.