Dropcam.com has a $150 HD camera with optional cloud based DVR service ($100 for a 12 month subsrciption with 7 days of backup). Like Canary it has event notification.
Click the featured cameras tab at the top to see actual live camera feeds. Like all fixed cameras sometimes it works very well, sometimes not so much.
This 1 size fits all cheap camera makes sense for a single room but not much past that. Try to get 3 or 4 of those sending video over your typical home internet connection at the same time...not going to happen.