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DIAL, YOU S.O.B.!
And who did that connect you to?
It's hard to believe that with all the media attention that has been focused on the use of cell phones while driving that AT&T and Samsung did not implement BT voice dialing. Many new cars have BT as standard and the rest have it as an option so for phone manufacturers and carriers not to provide this is a travesty.
As I understand it other Froyo phones have this capability but it seems to be hit and miss depending upon the BT device.
My car has Sync so I could use voice commands before updating to Froyo. Works great.

My car has Sync so I could use voice commands before updating to Froyo. Works great.
I dont know if it called voice dial or not, but if I do one long press of the magnifying glass/search key on the bottom right from any screen, I can say "call blah blah blah" and it does it. I always start with "call", then a name, and end with mobile, home, work, etc. Its never failed me.
Also, this has been tremendously helpful. Using the same long press, and say "call" then say a local business, one that is not in your phone, followed by the city and state. For the most part, it works great. Sometimes it cant, but will pop up a list of options/search results.
So, it does take one key press to do it, but its simple, and can be done from any screen. Hope this helps some of you!
BT voice dialing is a 2.2.1 feature and so not available on 2.2
I don't know if this will help, but I found an application in my 'Samsung Apps' called 'Vlingo Tap and Speak' that does the following: