Linuxense has issued a hacking challenge. For the first 48 hours, if it gets that far, no shell accounts will be available. The server is at: 202.88.234.250 After that time, shell accounts will be available during the remainder of the 96 hour challenge.
If you can get to root you can either:
leave your mark, or
take down the server
There are some specific rules about how to do it — be sure to read them. Should be fun.