A big question in my mind is how widespread adoption of Linux outside of North America and Western Europe will become, since Windows is so expensive and Vista is the most resource intensive Windows yet. A lot of individuals and governments in poorer countries are looking very seriously at Linux as an alternative Windows, not just because of the price but also because the don't want to be beholden to a Big Corporation for what they can do with their computers. Free/Open Source software is a great solution for this.
Well, here in southamerica, linux is growing fast. There is a little community but very active. The most advanced country is -I think- Brasil. Everybody knows Conectiva, joined to Mandrake. There is other interesting projects there, and they provided several great programmers to the open source. The state is migrating the hole system to linux. In Argentina there are interesting projects too. Tukito K is a live cd, very nice. They focus in user-friendly and in local common hard support (including winmodems). Adrenalinux is a slack based with many flavors. The most advanced is Ututo. Based in Gentoo, Richard Stallman use to talk about them. Is a very promising project, with a new system to solve dependencies. A difference with Brasil is the state. The state is not migrating at a national level, but there is some interest though. Several local goverments are migrating to linux now, as San Juan and Chubut. Our army is developing their own linux, to reach high security standards. The linux good here is not just the malware thing, the control you can have over the process and the human readable config files are the key. The last makes the os completely transparent, and you can know what the system is doing all the time.
I think a big example for us is the extremadura goverment at Spain. They are working great, with several projects for education and small companies. If they could document their experience, would be great for latinamerican countries. Other countries are working nice too, I read about Cuba recently, migrating to linux. Probably Joe is well informed about that.