Well, here's what it says right now on the jail page (only visible to players who are NOT in jail):
Jail
This is the jail. It looks awfully empty, all you see is quality 999 walls in all directions.
You don't know why you are here, or how you are able to stay alive in this closed space without proper ventilation, or how you got in here in the first place.
Oh, you are just visiting? Here is a list of people currently in jail:
Johnny Cash- Lifetime
Kyratzes Talvadore- Lifetime
RICHEST MAN IN EOS- Lifetime
Revanchism- Lifetime
Albert Rubin- Lifetime
Steve Jobz- Lifetime
decryption- Lifetime
Investment Banker- Lifetime
Sam Bollock- Lifetime
Concerned RoboCitizen- Lifetime
Dave Johnson- Lifetime
Kudaros- Lifetime
Gail Goose- Lifetime
DropsySufferer- Lifetime
Toby Ziegler- Lifetime
Josh- Lifetime
Milo Minderbinder- Until June 17, 2012, 7:58 AM
Saint-John Cornwall- Until June 17, 2012, 7:58 AM
Broken Loose- Until June 17, 2012, 7:58 AM
Banpower1- Until June 17, 2012, 7:58 AM
TealC Apophis- Until June 6, 2012, 10:00 PM
Arash- Until June 6, 2012, 10:00 PM
Howard Roark- Until June 6, 2012, 10:00 PM
Maarak- Until June 6, 2012, 10:00 PM
Herb Derpman- Until June 6, 2012, 10:00 PM
Airbeat- Until June 6, 2012, 10:00 PM
Carlos Francis- Until May 13, 2012, 2:38 PM
Pomeranian- Until May 13, 2012, 2:38 PM
Hector Molina- Until May 13, 2012, 2:38 PM
Jonathan- Until May 8, 2012, 8:44 PM
Francis Gerard- Until May 8, 2012, 8:44 PM
Andrew N. Liveris- Until May 8, 2012, 8:44 PM
walker page- Until May 8, 2012, 8:44 PM
Bill Gates- Until May 8, 2012, 8:44 PM
BallC- Until May 7, 2012, 10:00 PM