Ahzad
Explorer
Green slime shows up in Return to the Moathouse, an RPGA adventure that I wrote for Origins '08. I think you can still download the adventure through the RPGA.
In the adventure, the slime is a combination trap/hazard. It makes an initial attack as it falls and does ongoing damage on a hit. When the PC saves, or if it misses, it moves to the nearest open square. Thereafter, it attacks the nearest creature until it lands on a new victim, and so forth until destroyed.
That might not serve as the canonical version, but it worked well enough when I ran the adventure.
Cool I'll check it out.
Yea I went thru the DMG b/c I knew it was a hazard didn't find it either, but old habits die hard. Heck I still call these new fangled adventures or adventure paths modules

