Yes! I've been a member of the ARBA since at least 2008. The membership fees are very reasonable, access to your district leader is easy, and the magazine "Domestic Rabbits" has lots of interesting articles, keeps you up to date on what is going on with the ARBA and within the various districts. It is published every other month and keeps improving with each issue.
I don't show, but I still want to know what is going on in the rabbit world. I found out there are rabbit hopping and rabbit agility competitions. There is always an update on the development of new standards and COD (Certificate of Development) status -- lets you know if a new variety is showable. I think the magazine alone is worth the membership and everything else is just a bonus. The ARBA officers publish articles on legislation that can affect rabbit breeding and rabbit breeders, which I find helpful.
There is a vet who publishes an article each edition and in one edition there was an article that show you two ways of setting up an automated watering system for you small rabbitry... and how to heat the lines in the winter.
Did you have any specific questions I may be able to answer or direct you to a better source?