The low-cost laptop, designed initially for schoolchildren in developing nations but now being made available to Western economies, will run both Windows XP and the Linux-based Sugar OS.
The use of Linux on OLPC's original XO laptops was seen as necessary to drive down the cost of the machines, with the ultimate goal of making them available for $100 (£50) per unit. However, the group says some potential governments have been opposed to open-source software.
"Some countries have been adamant about using Microsoft software," said Keller.
A high-level government official in Egypt was among the first to tell OLPC that his country only wanted the XO if it could run Windows, for example.