Just recently got a puppy and I wanted to put in a relatively inexpensive camera in the dogs room. I just need to be able to check up on him while i am at work using my iPhone. Any suggestions? Also how easy are they to setup?
Here's one that can be set up for remote viewing over the internet and supports 802.11g or wired networking. Setup of these can be a bit complicated as you need to do some customizing of your home network by setting up an internal static IP address and port forwarding. You may also have to setup a free account with DynDNS.org to connect to your camera over the internet if your ISP does not provide static IP Addresses for your internet connection.
What you are looking for are IP cameras. I don't know if any offer software for the Mac for the security recording functions though. But most if not all will offer full control through your web browser for viewing in realtime.
I mention this model because it offers pan/tilt/zoom for a reasonable price with good reviews. There are cheaper models that also have night vision. But they have either poor reviews, compatibility problems with browsers other than IE or no reviews.
You could also look for some home automation stuff. So you can remotely turn the lights on an off in the room.
A few years ago a cousin of mine built one with a squirt gun attached to keep the dog out of the trash in the kitchen when he wasn't home. After one salvo the dog won't step foot into the kitchen. When he looked through the cam at work he'd just see the dog looking into the kitchen occasionally. The cat would just shoot through the kitchen when it wanted outside.