Well, I just placed an in-store pickup order for a Samsung Galaxy S device for my company Cellular South! Huzzah for a long awaited upgrade from my HTC Hero! My Hero has serviced me well over these past 12 months, but it was on its last leg and it was time to place it in backup. Can't wait to go get my new Galaxy S in the morning!
My wife went from an HTC Eris (Verizon's Hero variant, I had it rooted and overclocked with a custom rom/kernel) to a Samsung Fascinate (Galaxy S) and loves her phone. You'll have to get used to TouchWiz, but it's not too different from Sense.