http://www.rabbitsonline.net/view_topic.php?id=12067&forum_id=17
That's the link from the bunny 101 forum, hopefully that might help.
Generally bathing a rabbit is like a last solution. You can buy wipes that might do a good job of cleaning a bunny without a full bath, or use a warm, damp flannel. Some people will give a butt bath if necessary.
A full bath can put a rabbit into shock, and they can also digest a lot of fur when they are wet, due to them grooming themselves.
Having said that, there have been times when I have had to bath a bunny. I have had two bunnies that have needed baths, and they have needed them more than once, most of my bunnies have never had a bath.
When I bath them I used warm water (tested with the elbow like you would if you were going to bath a baby), and I use the mildest shampoo I can. There are rabbit shampoos but I have never used them.
Its best to do it on a really hot day so that the bunny doesn't lose too much heat, and it's easy to keep them warm afterwards.
Usually I towel dry them as best I can, but once I used a hair dryer because I knew that the bunny would be ok with it, but you can only do that if you know for sure, otherwise it's too risky. But if you use a hairdryer, don't aim it straight at the rabbit, do it from a distance and sort of waft the warm air around.
But generally, a bath should be avoided if at all possible.
