Advantages over the NYTimes article search api is The Guardian provides full article text and allows you to use the content on your site/app alongside your own advertising.
Disadvantage is it seems to have less structures metadata than the NYT (from what I can see currently).
I'm looking forward to most newspapers having apis letting you correlate coverage across multiple sources (hopefully with a consistent interface)
We have a nod towards a consistent interface in the Guardian API in that we offer an Atom output format - it's pretty basic at the moment, but we're looking for community feedback to help us make the Atom version really useful.
Disadvantage is it seems to have less structures metadata than the NYT (from what I can see currently).
I'm looking forward to most newspapers having apis letting you correlate coverage across multiple sources (hopefully with a consistent interface)