i think OpenSky and M/A Com in general are unlikely. Most state resources are Motorola now. Further, the bulk of the state trunke systems are Motorola. Think of the eastern shore...Caroline, Talbot, Queen Anne, Dorchester, Wicomico, and soon Kent county will all be on the UES Consortium Radio System- a MOTOROLA type II digital system.
Then there's Anne Arundel, Charles, Calvert, Howard, Frederick, Montgomery, Carroll, Harford, Baltimore, and Balt City...ALL Motorola 800 TypeII.
The only ones I can think of that are M/A Com systems are Somerset, Worcester, and Cecil.
From an interoperability standpoint, the state cant do anything BUT Motorola. Besides, they piggyback on most Motorola county systems now and they own the portables associated with each system. Why change all that?