Yes.  I've spoken @ WWARA already in order to address the repeater owners throughout the Puget Sound.  What came of that is that most repeater owners have very little power over their sites when it comes to installing new gear, and are typically (>95%) not the site owners.  It's still a viable avenue though in terms of who might be interested in using or supporting such a system, but probably not from the sites-for-HamWAN angle.  Perhaps you know more repeater folks, give it a shot!

FWARC has expressed the most interest in D-Star over HamWAN for their D-Star system.  However, their site is fairly low down, on Graham Hill.

--Bart