This potential gem came to me in the morning mail. Old Magazine Articles features, well, old magazine articles. The site has articles from old magazines about all sorts of historical topics ranging from art to World War II. The focus of most of the articles appears to be America, but this is still a valuable source. The articles are all drawn form various period publications and so form a wonderful primary source.
Unfortunately, you only get to see individual articles from a magazine, and not the whole magazine, so you miss much of the flavor of the period pieces. Yet the articles can put many current issues in perspective. You need to take a look at the pieces on Iraq as an example.