You can go into:
https://egov.uscis.gov/cris/caseStatusSearchDisplay.doAnd register your case receipt number, get an e-mail confirmation, then go back to that site above and login.
You will see something like this:
Receipt Number Your Tracking # E-mail Last Updated
LIN*00122xxxx YourName Y 04/05/2008 N400 APPLICATION FOR NATURALIZATION
I don't know why some use the word, touched when they actually mean if and when their case was updated, I mean:
My case was touched.
My case was updated.
Number of typed letters is exactly the same.
With Nebraska, our cases were never undated, our application date is 03/31/2008, but it took over a week before our case was online with that Last Updated date of 04/05/2008, but we received the receipt, biometrics, and the interview letter which would indicate somebody was looking at our case, but that date never changed. Same with the I-485 and the I-751, so for us, checking online status is a waste of time.
If you do not want to register, just type in your LIN*xxxxxxxx Application Receipt Number: hit search and get a message something like this:
Application Type: N400, APPLICATION FOR NATURALIZATION
Current Status: Case received and pending.

n March 31, 2008, we received this N400 APPLICATION FOR NATURALIZATION, and mailed you a notice describing how we will process your case. Please follow any instructions on this notice. We will notify you by mail when we make a decision or if we need something from you. If you move while this case is pending, call customer service. We process cases in the order we receive them. You can use our processing dates to estimate when yours will be done. This case is at our NEBRASKA SERVICE CENTER location. Follow the link below to check processing dates. You can also receive automatic e-mail updates as we process your case. Just follow the link below to register.:
Yours will be identical except for the date and Service Center. It's another untouchable message that never changes.
If you click on If you would like to see our current Processing Dates for Applications and Petitions, click
here.
Can look up the processing date at your local field office, ours is in St. Paul and shows they are processing N-400's as of July 27, 2007 meaning for us with a March 31, 2008 receipt date we shouldn't expect to hear anything for the next seven months, at least. But our interview is scheduled for July 17, 2008, so those processing dates are also incorrect.
Yet your congressman, senator, Ombudsman, calls to the USCIS, or even trying to make an infopass appointment all rely on those published dates and won't or can't do anything until that published processing date is at least 30 days later than your receipt date.
So if you like that touch word can say your case has not been touched.