While it is T20, 2320AD can be used with D20 Future. The Referee's Chapter does contain some notes on converting it for use with D20F. I think T20 is a better fit, though, especially for combat, and for combat involving vehicles.
I've been hanging out for my moot subscription so I can read the 2320 play test documents. But I think 2320 will be published before I gain mootie status
Anyway ... I'm really looking forward to reading the book Colin!