For Hubble Space Telescope fans: NASA has been achieving steady progress toward restoring operation. The 'scope failed on Sept 27 and NASA delayed a Space Shuttle repair mission, which will be the final service call to the Hubble.
They decided to switch over to the "B side" electronics -- a dicey proposition, since they have been idle for 19 years. Imagine finding a radio in your garage that you bought in 1987 and turning it on, and you get the idea. Except that this is a bunch of radios, three processors (including a pre-Pentium Intel '486 and a '386), and a mess of — well, other stuff.
The blow-by-blow description has been interesting to watch. The systems tossed themselves into "Safe Mode," powering down due to detected faults, but these so far have been artifacts. As they learned the causes, they have gotten more and more systems to wake up. Most recently, they found that the safety system was checking for a supply voltage before the monitoring gear had collected the data. The voltage was up, but the monitoring gadget didn't know it yet.
See the report from Popular Mechanics. If you want to really geek out, a blog from electrical engineer Steve Leibson goes into great detail on the engineering challenges. There are several articles. Click on the Hubble-threads listed under "Recent Posts."