Have you found some funny signs so far? Actually i was hoping to find some funny notes (eastereggs) hidden by the (or some) developers. But so far it was all pretty regular.
Like these ones:
http://imageshack.us/photo/my-images/215/screenshot2012012018152.jpg/
All personel must register with planet regulation.
System jumpers must conform to planetary law and codes.
http://imageshack.us/photo/my-images/545/screenshot2012012018153.jpg/
Vehicles in restricted zones are subject to stellar regulation.
Buckle up it's the law.
Blaster free zone.
http://imageshack.us/photo/my-images/191/screenshot2012012018154.jpg/
Watch step
Warning
Construction zones are off limits to any unauthorized personel.
Any vehicle or lift should be approved by a sub level zone officer.
http://imageshack.us/photo/my-images/233/screenshot2012012018164.jpg/
Tracking
Tracking seizmic activity
Log number twenty one lock
Assessing data logs end.