In reading an article at the BBC on the problem of illegal immigration in South Africa it struck me that in many ways their situation is similar to the US. You have a neighboring country with has a lot of desperate people looking to survive sneaking into the country. It's funny for how much we hear about immigration in the news these days, we seem to rarely hear about countries with immigration issues getting together and talking about what has worked and what hasn't worked for them.
There are a few blogs that look at the issue more :
This Scepter'd Isle
South Africa Info