In English: doing it for one container ain't enough.
Anyway, I do have a connector component working now (for very limited versions of "working" so far) at https://lucenerar.dev.java.net/. The goal is to have a connector which can be deployed in any J2EE 1.3 or 1.4 container, and communicated with via JNDI to perform full-text search and maintenance.
Currently, it's not there - in fact, it's so limited that it always adds the same text and searches with the same query! I expect it to grow past that very quickly, however - within a day or so.
So please feel free to participate! We need all the help we can get, both to help define the processes and to help get them working, and everyone's welcome.