Over the last couple of years I have heard that the CBP was coordinating and installing new P25 digital gear in the state of Florida.
I just spotted a post on Radio Reference that indicates the Customs and Border Protection radio systems in Florida have finally moved towards the digital domain after being analog for many years:
http://forums.radioreference.com/federal-monitoring-forum/297786-news-flash-florida-bp-throws-p25-switch.html
There are what appear to be some of the new CBP DNET channels in the +170 MHz end of the band, so I will list them as they can be ID'd in the CBP Frequency Update area on the blog main page.