M'ath, zhey shanoxilt! Welcome to the Learn Dothraki webforums!
We try hard here to keep the information on this site as current as we can. A number of us here are able to communicate regularly with David Peterson (who I know does some stuff on Reddit as well), who keeps us on the 'straight and narrow'. If you haven't already, you should check out David's blog at
http://www.dothraki.com The wiki and dictionary here are about as close to 'official' as you are going to find anywhere. In any case, I hope you find what you are looking for, and we stand ready to help Dothraki grow.
I see you are into Lojban. Do you you know Mark Schonblum? I had the pleasure of spending three days with Mark about a month ago, at the Klingon Language Institute's annual meeting, just prior to Worldcon. Besides Klingon, we talked a lot about Lojban, which is a language that I am interested in and hope to learn once Na'vi, Dothraki and Klingon are 'under my belt'.
In any case, welcome! and I will have to check out your resources on Reddit.