A Massachusetts juvenile has pleaded guilty to a January 2005 attack that ultimately exposed the cell phone address book of U.S. socialite Paris Hilton to the Internet, according to T-Mobile USA, the mobile phone provider whose servers were compromised in the attack. – quoted from here
From the Washington Post 2 further links on this – link1 link2
a much more detailed news report from CNET News regarding this 17 year old
This all occurs at the same time as the return of Kevin Mitnick (His company) returns to online usage as listed in Wikipedia