Western Illinois University is notifying more than 180,000 people that their personal data is at risk after <A HREF="http://news.zdnet.com/2100-1009_22-6090860.html?part=rss&tag=feed&subj=zdnn">hackers entered its networks.</A> The university said it mailed the last of its notifications on Monday to people whose Social Security number, credit card account number and other sensitive information were on the student service servers in the security breach.