Mary Hodder has blogged the first of a projected series of articles analyzing blog and RSS search and aggregation services. This is a needed thing, especially if we're looking at the emergence of Web 2.0*.
Hodder starts by comparing five tools: "Technorati, Bloglines (as an information search tool, not a news reader tool), Feedster, Blogpulse and Pubsub." The comparisons (.pdf) are fascinating, and the methological discussion very useful.
One key observation:
All five of these services are very valuable, as they each show us different things, and frankly, for my information needs, I want and use all of them each day to track myself, my projects, companies I consult for, and all of my areas of interest, which are numerous. Often, the combination is the only way to get an accurate picture of what is happening online across blogs and RSS feeds.
Once the current frenzy of program slows down next week, I'll return to this topic.
*Note that the Wikipedia entry on Web 2.0 is in NPOV dispute.