BootZilla v4.0 (AKA: BHT v4.0.0) was released on September 13th, 2007.
Patch releases will follow, as 4.x.y-yymmdd builds.
Patches support all previous releases, going as far back as BHTmicro v3.9.1, which was the original BootZilla v4.0.0 alpha.
I do not have any laid-out plans for the future of BootZilla, as it seems to evolve on its own - that is, through constant updating, I will probably manage to create a need for a more enhanced solution to the BootZilla Update system that is already in place.
Anticipated changes From 4.2.0 to v?.?.0
* NONE YET
I do not know what the next version will be, nor what it will include.