All those with a locked bootloader.

BTW: Is there a complete list which ones have an unlocked or unlockable bootloader?

I know about the following:

- Android Dev Phone 1 (HTC Dream)

- Ion (HTC Magic)

- Motorola Droid (unfortunately not the Milestone)

- Nexus One (HTC Passion)

- Nexus S (relockable) (Samsung Crespo)

I think we're moving towards unlocked phones. Both HTC and Samsung have sent signals that they want to open up their phones. And then we're talking about drivers and specifications. Everything that can get them one step ahead of Apple. Also, it seem to be deemed "cool" to be open, so they might just spin it to marketing.

Sadly I don't know if this will be the case for US, where the operators have way too much control over the devices. Luckily I live in Europe, outside of EU. :-)

Samsung Galaxy S 1 & 2 (international versions).