One Laptop Per Child: Who really benefits?

Much has been written in praise of the OLPC (One Laptop Per Child) project since it was launched two years ago. What a brilliant idea - provide every child in the developing world with a laptop of their own.  

OLPC is not, at heart, a technology program, nor is the XO a product in any conventional sense of the word. OLPC is a non-profit organization providing a means to an end—an end that sees children in even the most remote regions of the globe being given the opportunity to tap into their own potential, to be exposed to a whole world of ideas, and to contribute to a more productive and saner world community.

According to the OLPC site, $20 per child is spent on education in the Global South compared to $7,500 per child in the US. Even with the huge difference is expenditure, children in the US and other parts of the West share computers in school technology labs.   At over $100 per laptop is  OLPC the best way to use limited resources in developing countries?

We are told that the OLPC is not a piece of technology but a "learning tool" as pioneered by Seymour Papert. But Papert was also a proponent of collaborative learning which is not inspired by the idea of OLPC.   Would it not be more cost effective and educationally beneficial for governments to provide schools with computer labs where classes have regular computer time and pupils have to work together?  

Recently the Nigerian state of Ekiti purchased 10,000 laptops for each of it's secondary school students out of which 250 will be internet compliant. I would be interested to know what other resources the children have such as their own text books.  Since there are only 250 internet compliant computers these will clearly have to be shared in a computer lab so why not purchase x number of computers for each school's technology lab to be shared amongst the students plus use the remaining funds to buy other equipment and resources such as for sciences, electricity supplies, paying teachers proper wages and so on. 

On a final note by selling the idea of OLPC as THE essential tool for every child in the Global South, someone is making millions of US$, in this case, Quanta Computers.