I thought the comments by delphi and Jordan were good, also ThePete and TankerKevo (search for their names if short of time)
The FOSS movement seems to consist of at least two sorts of people. Those who would impose FOSS on everyone (lock in) and those who actually believe in democracy and freedom including the right of Microsoft to compete and not be locked out of the OLPC.
The former group are dangerous. They want to replace a bad thing (monopoly capitalism) with a worse thing (Communist Party Soviet Union style compulsion).
Wayan Vota has always said that the OLPC is a hardware project and not an educational project. He hates Negroponte. Now he is saying that because Microsoft might put Windows on the OLPC it is the end of the road of the OLPC as an educational project - even though he has always denied that it was an educational project in the first place.
At any rate his melodrama is technocentric - that the OS decides everything. It doesn't.
As a few commentators on the thread point out:
- there are real problems with Sugar
- all the constructionist software runs fine under Windows