Personal Information Aggregation Nodes
Agnostic aggregators are the focal point of information aggregation. The tools that are growing increasingly popular for the information aggregation from internet sources are those that permit the incorportation of info from any valid source. The person in control of the aggregator is the one who chooses what she wants to draw in to their aggregator.
People desiring info agregation seemingly want to have control over all sources of info. She wants one place, a central resource node, to follow and to use as a starting point.
The syndication/pull model not only adds value to the central node for the user, but to those points that provide information. This personal node is similar (but conversely) to network nodes in that the node is gaining value as the individual users make use of the node. The central info aggregation node gains value for the individual the more information is centralized there. (The network nodes gain value the more people use them, e.g. the more people that use del.icio.us the more valuable the resource is for finding information.) This personal aggregation become a usable component of the person's Personal InfoCloud.
What drives the usefulness? Portability of information is the driver behind usefulness and value. The originating information source enables value by making the information usable and reusable by syndicating the info. Portabiliry is also important for the aggregators so that information can move easily between devices and formats.
Looking a del.icio.us we see an aggrgator that leverages a social network of people as aggregators and filters. Del.icio.us allows the user to build their own bookmarks that also provides a RSS feed for those bookmarks (actually most everything in del.icio.us provides feeds for most everything) and an API to access the feeds and use then as the user wishes. This even applies to using the feed in another aggregator.
The world of syndication leads to redundant information. This where developments like attention.xml will be extremely important. Attention.xml will parse out redundant info so that you only have one resource. This work could also help provide an Amazon like recommendation system for feeds and information.
The personal aggregation node also provides the user the means to categorize information as they wish and as makes most sense to themselves. Information is often not found and lost because it is not categorized in a way that is meaningful to the person seeking the information (either for the first time or to access the information again). A tool like del.icio.us, as well as Flickr, allows the individual person to add tags (metadata) that allows them to find the information again, hopefully easily. The tool also allows the multiple tagging of information. Information (be it text, photo, audio file, etc.) does not always permit itself easy narrow classification. Pushing a person to use distinct classifications can be problematic. On this site I built my category tool to provide broad structure rather than heirarchial, because it allows for more flexibility and can provide hooks to get back to information that is tangential or a minor topic in a larger piece. For me this works well and it seems the folksonomy systems in del.icio.us and Flickr are finding similar acceptance.