I feel it's necessery to point this out, as every so often I talk to someone about the olpc project and a major misconception is discovered. So I am going to say this as plainly as I can. I should also say that while I'm a developer, I don't actually work for the One Laptop Per Child project, and I don't speak for them.
The One Laptop Per Child project has no plans to commercialise the product.
You will not, as a first world high flying pay $500/week on gadgets software developer sysadmin engineer be able to buy this gadget. There is significant doubt as to if you will even be able to buy them on ebay second hand off a third world arms dealer.
However, if you are an open source fanatic and love the idea of being able to educate little people in the third world, have good ideas and the required time to implement them, you can help the project.
You can run the sugar interface in emulation. There is a livecd you can boot, there are qemu and vmware images. There is even the ability to run the software under a linux such as Fedora or Ubuntu. See the wiki for more information.
There is also a program where you can apply for a laptop to be given to you so you can do development on them. See Developers Program page on the olpc wiki.
It is not a gadget, it is an educational machine.