That is so nice of you Ray. Word of mouth is hugely important for a website like ours, which is small, without outside funding and so no huge publicity budgets. We do promote ourselves regularly to food magazines and the food pages of newspapers but there are so many recipe search engine sites popping up (it feels like one a week sometimes) that it is hard to get noticed. Of course Eat Your Books is completely different to all the other recipe sites that just scrape recipes from the web. There is no other website in the world where you can search recipes in cookbooks, magazines, online and your personal recipes. So you would think the journalists would be clamoring to write about us, wouldn't you?
The discussion forums are actually very important for us as a source of referrals. Until recently our top referral site was ChowHound - it is now Food52 since we were recently listed in their top food finds of 2011. But any forum where "cookery nuts" as you call us (I like it) assemble is a good place to get the word out. Even just adding a post about EYB to a topic on a blog that is related to recipe search, recipe management, etc can result in a big uplift in site visits.
So please just carry on doing what you are doing. Yes, more members, equals more revenue, equals more cookbooks getting indexed. So it's in all members' interests to get the word out!