Chang'e 4 touched down on the floor of Von Kármán crater at 02:26 GMT today. This is the first image from the lander:
There is no direct communication between Earth and Chang'e 4. Data is relayed via a satellite called Queqiao (trans: Magpie bridge) at the L2 libration point, 64,000 km beyond the Moon. Queqiao was pre-positioned in May last year. I don't know whether the relay has spare channels that might be available to other nations' far side landers, if and when they arrive.
Von Kármán is an enormous crater, whose Eastern edge is right on the 180° longitude. The cross marks the exact landing point, 45.471° S 177.606° E.
Here's where it is in relation to the whole far side. The very large dark area at 26.5° N, 148° E is the Mare Moscoviense, one of the very few maria on this side of the Moon. Tsiolkovsky, the crater that Ken Johnston says contains an alien base, is also notably dark, at 20.4° S, 129.1° E (almost due NW from Von Kármán). The so-called "crashed spaceship" visited by the non-existent Apollo 20 mission is at 18.66° S, 117.68° E; NW again from Tsiolkovsky and well over toward the near side.
Trivia: The crater is named for Theodore Von Kármán (born Kármán Tódor in Budapest), a mathematician and aeronautical engineer who was one of the founders of JPL. The public auditorium at JPL is also named for him.
Update 4 January:
This is how far the Yutu rover has progressed. It will now go into sleep mode for six days to assure survival during the hottest part of the lunar day.
Update 11 January:
The real-time descent and landing video is now available.