sorry - just saw this post today.
I took my Arlo web cam down (due to privacy issues), but yesterday I put it up at a different location. It successfully took snapshots every 5 minutes for close to 24 hours, but then had some sort of problem and I had to reset the camera. It's working again.
I did apply for a WU web cam, but I noted that each snapshot must be less than 150K. I cannot control the size of the snapshot, and the size varies by the amount of daylight. So I'm sure it will sometimes be more than 150K and WU probably won't accept.
But, I just added to my personal web page, and it looks nice:
http://www.actulife.com/pws