So let me give you the cons that I know
1. it's a convenience. Many people spay/neuter because they don't want to deal with a rabbit being a rabbit. males have certain behaviours, females have others that are directly related to being the sex that they are. MANY rabbits, if well handled by confident handlers do not exhibit unwanted behaviours.
2. finding a good rabbit knowledgeable vet is difficult in many parts of the world.
3. it's expensive. more expensive generally than getting a cat or dog done.
4. it's not guaranteed to get rid of behaviours.
5. cancer is often used as a scare tactic to get people to spay their female rabbits. yes, it totally removes the possibility, but of the 100's of rabbits I have known or know about 1, just 1, rabbit got cancer. So it can't be that prevalent.
Herds not Hoards. a new blog that I just ran into. Just three posts. Seems very common sense.
A feel good story I discovered at Pet Rabbit News. It's about a pet rabbit that helped save a family whose house was burning. Good survival instinct in that rabbit! :)
The Rabbit Whisperer has some interesting articles. Written mostly from a pet bunny perspective, but has some helpful ideas in there, particularly for new rabbit owners.