A friend of mine who used to work in a bike shop once recommended against using a hose to get rid of mud, as water can get into seals and bearings. Instead he suggested to let it dry and use brushes and rags to clean the bike. I've always followed his advice.
Another buddy doesn't clean his ride at all, he says it'll get dirty on the next ride anyways :)
What method do you guys use to clean your rides, and how often? Has anybody experienced any issues after washing with a garden hose?