I don't know, he might string me up if I get too specific.
But there's been everything in there from stubs for factions, to things like tractor beam underlying stuff, ions, warhead pieces, paralysis stuff, prep stuff for data centers, and so on and on and on. Bits for nukes, black holes, alarm posts, cloaking, the list is really super long.
I have no idea as to the completion state of any of those particular items, but it's a lot of wiring up. I gave you about a fifth of the list of broad line items from his svn commit notes, if even that.