I am pretty sure there is, but don't know where they hang out.
At the San Antonio Radio Club's annual swapfest in January there were several Houston area hams walking around with apx7000s, one even had an 8000. I imagine they are active somewhere when back home, just don't know which band.
Here in SA, there is a group that talks on 146.46 and I know of someone looking for a place to put up a 2 meter p25 repeater.
~S~