flex inset with data from a LyX dialog

[PhilipPirrip]

Hi there,
I don't think there's currently a way to achieve this, but might be a 
very powerful feature:
Let's say I want to define an inset that needs input from a LyX dialog. 
It could be a new citation inset that'll be used with biblatex, and the 
LyX dialog in question would be the Insert>Citation one.
In general, one would want such insets that use some of LyX's 
infrastructure - be it citation, cross reference, language selection...
I think flex insets have much more to offer and was wondering if there 
were any thoughts of expanding their use throughout LyX. Not all things 
(like the forementioned bib(la)tex citations) have to be hard-coded, 
much could be accomplished with user defined insets and modules... if 
only support for the use of LyX's infrastructure was there.
Any thoughts?