Yahoo! keeps saying it's a content company. Given what they knew via delicious, it seems like a competent production group could have noted the top marks in any category, figured out why they were so successful, then combined them into a product with commercial value, either licensing he content directly, or commissioning the original authors to develop their ideas on Yahoo's dime, then subdividing this nicely vetted material by proven authors for use across a range or properties (e.g. photography related stuff in Flickr, investing references in Yahoo! finance, etc.)