The first cut of Evolution contact support for GC Dialer has been developed, tested (on the desktop), and is available (through subversion).

Notes:
* This has not yet been tested on tablets to see if it breaks anything or how well it accesses tablet contacts if at all.
* The default address book is "None"
* You choose evolution address books separately
* You change address books through "Edit"->"Settings", select your new address book, and hit apply
* The GUI is not in its final form, it was just my first thought. What I think I'll do is just put a combo box on the contacts tab to select on the spot the address book.