I made a pleasant discovery yesterday while looking up the word salmagundi ("A dish composed of chopped meat, anchovies, eggs, onions with oil and condiments", and by analogy any assorted mixture). The full archives of the magazine, while accessible only to subscribers, can be searched by full content on Google. This is a great leap over the DVD-based Complete New Yorker, which only had keyword search, and the New Yorker site itself, which only allows you to search within the current issue.
Try it by adding "site:archives.newyorker.com" to any query. For example, salmagundi. You can see from the snippets that the scanning job isn't perfect, but still, pretty great.