Woke up this morning and found no wireless connections, starting cursing the latest update to the Time Capsule. Went downstairs and there were no lights on the TC...then I realised there were no lights on anything in the area. The power block was turned off! Suspect one of my cats walked across it and trod on the the switch (again).
I did have a issue of the last weekend where the hard drive became unusable, even though I could see it and was able to erase it. Time Machine was still unable to use the disk, cycling the power seemed to resolve the problem.