The Nitro project has created a core team of developers, and I’ve been nominated as one of them. That project is really starting to go places now: there’s a lot of vitality in the code base, and a lot drive to clean things up and get documentation rolling to the world at large.
I still haven’t received any additional requests for more tutorials, so I haven’t bothered extending the one I did for Og (Nitro’s ORM layer) a while back. I’ll ping the mailing list to see if anyone is interested in more stuff.