I recently watched a bucket truck and two city maintenance trucks, along with 6 workers, changing a street lamp in my city. Took them over two hours, and they blocked a lane of traffic in a very busy shopping district. Seemed like a tremendous waste of man power and equipment, when all that would be needed is a pole climbing bot with enough dexterity to open the lamp housing and replace the bulb. I'm thinking about building a prototype of some sort that could be scaled up to manage this task.
Other robots from Synthiam community

Luis's Multiple Sensors On One Uart
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Ellis's Halloween Robot
Here is Robot Max and his helper Tele. Sorry I am late getting this out. Couldnt bet it to load. Finally put it on...

Thefoolmonty's Joc's Ucontrol Wall-E
Still a work in progress and I have not decided finally on some aspects. While this is basically the same implementation...