I worked on the CDMA support for PhoneControl while it was in development. Here is my write-up. Not much has changed since then. Unfortunately, CDMA phones don't follow the rules of the standard AT Control set so we're pretty much stuck with ALMOST. The PCS Connection Manager from Sprint has improved some, but full integration into the front-end is still unattainable. So basically, I'm stuck with dialing out from the front-end (doesn't read phone's phone book must create external one for PhoneControl), answering and reading texts with the connection manager, and no text out capability.
There are some current software available, but I haven't bothered to try any, yet. Freephone and RRMobile to name a couple, but as you said the developers are across the pond using GSM.