The pending ones are either :
a) not rigged, or not rigged properly
b) not implemented by code into the 3D repository.
In short, "the status of completion" bit refers to the model being finished and textured etc, the "uploaded" bit refers to "rigged and usable in game, and implemented into the main 3D test repo". For some things this is quite straightforward, others are a bit of a nightmare to rig properly (at least at my current skill level). Karpov is far more skilled at the rigging, but his current focus is to try and get the main animations done for the female character and to produce the death animations and blood etc.
I'm trying to learn the rigging stuff to do this myself (look through some of my previous posts, and you should see some 'attempts' with various levels of success). I should be putting a tutorial up about the rigging during the next week or two, when I have some time off work. It won't be the best tutorial in the world, and will need improvement in future, but it will be a starting point. Other people can learn to do it better afterwards.
For example, NCR Ranger Patrol armour is down as "pending". I did a
test rig of this model, but there were problems with the shoulders and a few other bits. This may need a slight change to the model itself, or simply need rigging by someone with more skill. Duster coat is also in the same position i.e. the model and texture exist (though it's not quite good enough, and will need improvements in future), but the rig needs fixing and then uploading before it's counted as "done".
Basically, about half of the pending ones are my fault
Ones which are just a retexturing (like Leather Armour Mark 2) just need implementing in code, which should be simply a case of putting an extra line in the _FOHuman.fo3d, to say "use the leather armour model, but with this texture instead".
Hope that all makes sense.