I agree that's the key part. However, perhaps the reason upgrades are so slow is that Google is moving too fast for OEMs. Their profit margin on these Android p

I agree that's the key part. However, perhaps the reason upgrades are so slow is that Google is moving too fast for OEMs. Their profit margin on these Android phones is lower because they're more powerful and costly than the typical Symbian phone. No other phones (Blackberry, Sidekick) require them to be as involved in updating software. Apple ships iPhone OS updates via iTunes, not AT&T or Samsung. I think we'll see a fundamental testing of the limits of Android fragmentation this year as OEMs have to support so many different phones, starting from various points on 2.x. At what point will they cut off a phone as too old for updates? Will it be similar to Windows where you have an extended support period with only security fixes? Who patches security flaws in your browser on a G1 running 1.6 in 2011? HTC?