Interesting article - Samsung holding 2.2 back.

[JimboBob]

http://www.dailytech.com/article.aspx?newsid=20658

"Some disturbing things have happened the last week or so concerning our “Vibrant”. Samsung has NOT allowed us to push the update OTA for 2.2 because they feel it will decrease the value of the upcoming Vibrant4G +. While from a marketing aspect i totally understand, as the Vibrant 4G is what the original Vibrant should have been in the 1st place. But to shun off and bold face lie to customers is NOT what T-Mobile is about.

…Being that, Vibrant 4G and Vibrant have exactly same stats, added FFC and a new movie and the 4G. But i will tell you this, the original vibrant CAN utilize 4G FULLY. Yes FULLY. not what they are telling you."

 

[Maddmatt]

I think it's really just Samsung's incompetence with software that is the real problem. None of the official or leaked Froyo builds for the Galaxy S phones are without significant problems, which is possibly causing many carriers to reject the updates.
The latest 2.2.1 firmware is great, except for heavy battery drain with wi-fi. Speedmod custom kernel fixes that though. Sad that it takes customised firmware to experience this phone at its best, but once you do it's awesome.

I may avoid Samsung in future though. Depends what the competition can do and their attitude towards custom firmware developers.