I recently had occasion to set up a wireless video link from the observatory to the house. This allowed me to show some elderly visitors the moon on the large flat-screen LCD TV in the house. They were absolutely fascinated with the view, which was about 6 arc minutes, and even though it was mainly a static image, it was like they were waiting for another meteor to strike the surface! Gripping stuff!
I stopped short of controlling the scope from the house, but did do a 3 minute lap of the moon from the obs for them.
I used a 5.8 GHz wireless A/V sender from Jaycar
http://www.jaycar.com.au/productView.asp?ID=AR1880&keywords= 5.8+GHz&form=KEYWORD
It took literally only 5 minutes to set up at each end, and gave a virtually noise-free picture in the house, which is about 20 metres line-of-sight from the obs. I'll definitely be doing this again and may investigate whether I can connect an external antenna to the transmitter unit.
Chris