You can now register and create a portfolio to track your case, you also have an option to get email notification when an activity takes place, we don't have to check the case status 100 times during the day 
Here's the link:
https://egov.immigration.gov/cris/jsps/index.jsp;jsessionid=d0cYdDFxwBP_
Doesn't work in Netscape though.
Here's the link:
https://egov.immigration.gov/cris/jsps/index.jsp;jsessionid=d0cYdDFxwBP_
Doesn't work in Netscape though.