Last year I helped a guy who had a pricey webcam that he has on his tank all the time..that lead to me helpinf several more (from the DA forums) do the same. Funs tuff to set it up live..but you have to have a good internet connection. Cool thing is when away, you can check on your tanks anytime you want.
We did 2 cams..one for the tank..and one for below watching the equipment to visually see things are running right.