Previously, like many of you I'm sure,
I could only voice dial by speaking the number I wished to dial.
On a whim I pulled the contacts db out of my F700 using the instructions found in Stephanies post here.
When I looked through I found that while the majority of the numbers were in the format: 1235551212 several were listed as (123) 555-1212.
I changed all of the (123) 555-1212 to the 1235551212 format, saved and uploaded to the avic and voila! Voice dialing by name now works like a charm.
Hopefully this helps someone besides myself.
For the record the original contact list was pulled from a 1st gen iPhone