I created a page including users of elasticsearch: http://www.elasticsearch.org/users/. As you can see, its does not have nearly enough users, and I know that you are out there :).
So, if you can, add yourself to the users page, with a blurb about how/why you use elasticsearch. If you don't want to mess with github and the like, just send me direct mail with the text and I will add it.
Thanks in advance for adding yourself to the list. This list is very important as it makes other users feel better when they come across elasticsearch, and will help grow both the userbase and the community.