Ok, finally news...Not so good ones for anyone wanting some new features or bugs fixed in ReaBIN, though.
I finally decided to take the leap into the frustrating world of C/C++. That should eventually be rather exciting, as that should allow total integration within Reaper for ReaBIN, as well as other goodies. I've today installed MS Visual Studio Express (oh, what a drag it was) and made some initial experiments. There seems to be huge potential in the REAPER plugin API for all sorts of things. But to really get anywhere, I will have to spend time (likely weeks) getting myself comfortable with the new programming language and environment, the REAPER API itself etc...
Be patient, something good should finally come out of this!
Or Justin comes up with his own solution for the Bins thing himself...