Sanctuary has been working hard on his WW4 modpack and has gone through the beta stage to version 1 and has released it on the BI forums.
The WW4 modpack goal is to provide highly optimised troops and their weaponry to build massive battles without most addons usual performance hit : as few textures as possible, nearly everything in merged textures, optimised lod system, selections and polycount in very reasonnable amount without too much details cluttering the model, etc..
The ambition is to make the WW4 mod the biggest infantry mod ever done for OFP. Currently the goal is probably already met as in the WW4 Modpack 1.0 there are 19 different army corps ! (and more in the work) and each of those corps are coming in desert and woodland version to provide even more variation and mission possibilities.
Sanctuary has been also releasing beta versions of upcoming content of the mod, including new armor values, new effects and updated islands in the same thread. Keep an eye on it for the latest news!
More info, including installation instructions of the mod at the BI forum thread.