I actually own a site that will host your cam for you online and it's not expensive.
Mare Stare, LLCIt lets everyone help keep an eye on your animal - whatever it may be.
The wireless cams are nice (I have four - down right now for the season), but the ability to use them depends on how far the barn is (where the cam will be) to where the receiver will be in the house. You can have a clear path and still get interference from cordless phones, etc.
The cams are a wonderful thing - and I wouldn't be without them. Everytime I would drift off this season, I knew that there were others watching. And if you have a colicky horse you can put them on cam all night....or if you have a horse you want to sell - it gives someone the ability to see the horse live, because we all know that pictures don't do them justice. It also let's the buyer see how you interact with the horse.
Anyway...I could go on and on.......let me know if you need more info about cams.