There is but strangely there doesn't seem to be too many. This one seems to come up often in searches:
http://www.super-feeder.com/asfmodel.html
I have this vague recollection there was a vendor/sponsor on here a few months ago (was it Progressive or Blue World?) that had a tank in the store with a webcam and a web interface to the feeder (up to a maximum feeds per day though). Wonder what they were using ... will have to see if I can find the thread now...