8/1
8/1 under a million, it's a niche market without mass appeal. People who own an iPhone won't need the iPad, people who own netbooks, won't need an iPad. The only people who buy it are people like Stephen Fry who gush about any Apple product no matter how terrible it is.
It doesn't have business Apps like MS office, so no appeal there, it doesn't really have much appeal unless you try to find something specific to use it for, which means it'll end up gathering dust somewhere or another, so my money is on 8/1, under 1m units sold this year.