Techs & Trends
The T-Mobile Vibrant is the US model that looks most like the Euro Galaxy S (the i9000.) However that's just looks.
In terms of specs and features, the Captivate, Vibrant, and Galaxy S (i9000) are identical. Each simply supports the appropriate 3G bands for that network.
Only extremely recently - since Apple debuted FaceTime - has there been any interest in that feature in the US.
But anyway, you can't blame Samsung - or really the US carriers - for leaving out the front-facing camera. Data from Europe showed people almost never used that feature when they had it.