I've noticed that the Oklahoma Abandon Hospital cam has been kind of popular. So, I did a search and found a few more. The links are listed on the sidebar. Some cams refresh every 20 seconds while others may take minutes.
The Queen Mary cam has a chatroom below it for chatting with other viewers. The Asylums Gate cam has two while Dddavid's Cams, located in a 100+ year old Victorian house, has six to choose from. In order to view the cams at Asylumcam.com you have to sign up at the site. Registration is free.
If you know of any ghost cams that aren't listed on the sidebar, leave comment with the link and I'll add it. Enjoy ghost hunting from the comforts of your own home!