I too would refer you to the article by Dana Krempels. Sage Cat is correct that in humans and horses it is referred to as colic. 
Here is some more information on GI stasis. I am referring you to articles written by some very rabbit savvy people (Dana Kremples & a vet) because I think it is best to present it in a way such that you read the information exactly how it was presented:
http://www.bio.miami.edu/hare/ileus.html
http://www.veterinarypartner.com/Content.plx?P=A&A=484
If you want to discuss it further, just post your questions here and we can have like a “book club” discussion.
A condition becomes stasis when the GI tract becomes “static” or stops.
Some symptoms – not eating, hunched up in pain, lethargy, straining to poop, really small poop (which tells you the GI tract may be partially blocked – not to be confused with cecotropes), grinding of teeth in pain and even really loud noises from the stomach.
Immediate course of action – Read Dana Kremples’ article for this info CALL YOUR VET ASAP
Preventative measures – Even the most diligent person feeding the best diet, giving the best care can have a rabbit go into GI stasis as it can even be caused by stress. Really a balanced diet, plenty of fiber, toys, a meaningful, enjoyable life. : )
Know to call your vet before you post here. Every minute counts! Study up/print out the article and memorize what you should do.
So, if it does happen, you can spring into action quickly.