People, come on. We have really gone off the rails here with our speculation. 90% of the people looking at cell phones don't even know what 'Froyo' means. Have you ever seen Verizon (or any other carrier) ever use the Android version as a marketing tool? The bullet here is 4G -- millions of dollars have been spent getting the public aware that 4G is the best thing since toilet paper. Its the next "iPhone" tag; people will be walking into the stores saying they want "4G! 4G! 4G!"
There's obviously some reason that we don't have 2.2 yet, but its not because they want to boost 4G phone sales, or because Samsung is holding it for ransom, or because aliens created the Fascinate and we can't contact them for the source code. Eventually we'll get the update, and maybe someday we'll know the real reason that it took so long.