I think its really under utilised in the bonsai world, and think a good website is a huge assest to any business. Granted, it requires time that could be better spent with bonsai, but as Bonborn said, a simple wordpress site is very easy to use and keep updated. Even a facebook page would be a simple solution.
It was something that I noticed as I was collating the info for the directory. I guess it all comes down to the owner, and what they want their business to be
(not refferring to Ray's directly here, just a general comment

)
I'm always willing to help, as I just want to see bonsai in australia grow, and I enjoy web design for the most part