I like to stir the pot,and since one of the points of IdeaJam is to "gauge the marketability, popularity and viability" of N/D things let me propose this.
In a lot of ways DB2NSF seems like a holdover from the Dark Years when the goal was (seemingly) to upgrade the full functionality of a Domino server into the DB2/WebSphere stack.
DB2NSF in it's current incarnation has...issues. It's very picky about what DB2 you run and on what platform you run it on. It takes a whole lot of infrastructure and significant DB2 expertise to set up & run, it's not any faster than NSF for NSF-y things, and it seems to me that the SQL things it brings could be added in a much more efficient fashion to the NSF database directly. For example, NotesSQL does many of the verbotten things (joins, etc.) somehow and works quite well for reasonable datasets.
It seems to me that the development effort being spent on recreating NSF functionality could be/should be better allocated elsewhere.
So the idea is to add the basic SQL functions that DB2NSF brings directly to the NSF.