I just managed to get the ofxFFGL plugin working again, but I doubt we'll be able to release it. It's a shame openFrameworks tends to move things around so much, so the dependencies change all the time.
If you're not using all the add-on libraries, oF and straight up FFGL are not that different though, so you may not even need oF at all.
What kind of thing are you guys looking for in a tutorial? Do you just want to know how to make a plugin, or do we have to start with OpenGL basics?
What about a Hello World! / Cube Demo kind of thing?