Below is a link to a thread that will give you some information on the location of the Brownwood area.
I drive down that way a couple of times a month. They are still pushing alot of dirt and have several golfcart tunnels complete. It sure looks like they could open up Buena Vista Blvd to SR 44 today if they wanted to but must have a reason not to.
The construction of the new Sumter County Goverment building and Library at the corner of CR139 and 466A is going fast. The Daily Sun reported that the Goverment Center will be golf cart acessable.
There is also a four lane road that shoots off of CR139 by the Wildwood Senior Citizens Center off of CR139 and connects to CR44A at the West end of what will be Brownwood. A golf cart tunnel is now complete at this point as well.
It looks like they are making CR44A four lanes on the North side of Brownwood.
Buena Vista Blvd to SR 44 Construction Update