Most of the things on the adult swim section of site are newer shows like Eric Andre, Rick and Morty, etc, as well as really old shows like Space Ghost and streams from the adult swim website like Fish center stuff, and a few other random shows like ATHF etc. There are also recordings up on there (I would say like 5-10% of the adult swim part is recordings). Not a lot of AcTN, unfortunately, although there's like 700 pages of downloads up there so maybe I just haven't found any yet. I know one of them was of a night where they had an Inuyasha movie, but I haven't watched it yet. There's also a few random valuable things like how someone uploaded the entire library of Bumpworthy (which of course I immediately downloaded haha).
I downloaded most of the recordings I could find (still probably a whole lot left to download), but I haven't watched them all yet. The only ones I watched so far was a boondocks recording from 2005 and I remember one of the bumps being the AS transit map bump, another recording had the classic "everyone out of the pool" bumps, and another one I remember had a bump I didn't recognize, with a stuffed bear in a hockey mask holding a sign with jazz music in the background in some room. Those are the only that I remember sticking out to me in the ones I watched, but there probably more, but not many AcTN ones, if at all though. At least I haven't seen any in the ones I downloaded.
I'll try to follow up after I watch through all of these, if I see anything else. I would still recommend trying to get onto there, there's some gems on there if you look hard enough.