One of my favourite sites at the moment, or at least one I am finding continually useful, is Wikipedia. Wikipedia allows the users of the site to create and edit articles. You might think that would be a failure - but effectively the site creates and edits itself and there is some excellent content to be found.
Examples:
Wiki - wikipedia is a wiki - so read this if you want to know more about what one is.
Weblog RSS Attitude
Motivated by some unfairness and major issues he perceived in the record industry, John Buckman started Magnatune. His reflections on the record industry and the business model he proposes (and is putting into practice) makes an interesting read. You might even find some music you like.
A good analysis of the limitations of RSS. Some limitations involving convenience and usability (e.g. no reader packaged with MS Windows yet), others issues for the site offering rss feeds (e.g. bandwidth issues with repeated downloading of full feeds), and some related to issues with the format itself (e.g rss does not allow secure access necessary for paid content delivery).
Want to escape the paid ads? a clean-interface alternative to Google? or looking at improving your rankings in Inktomi? Here is a nice way to search Inktomi - the search index that serves Hotbot, Excite, MSN (for now) and soon Yahoo. You can even specify the medium of content (HTML, PDF ...).
The previous article linked to this site from a couple of important gurus of the Internet.
The Net isn't rocket science. It isn't even 6th grade science fair, when you get right down to it. We can end the tragedy of Repetitive Mistake Syndrome in our lifetimes — and save a few trillion dollars’ worth of dumb decisions — if we can just remember one simple fact: the Net is a world of ends. You're at one end, and everybody and everything else are at the other ends.