I am adding the new O'Reilly Radar to my RSS aggregator to follow for a while to see if it is worth adding to my regular links page, which needs some pruning and planting. The Radar is a blog focussing on what four people at O'Reilly believe is new and interesting to them.
I found the link through a folksonomy feed, but found the developer mistook categories and general tagging for folksonomy and weighted tag use visualization for folksonomy. Both categories and tagging are very helpful tools, while weighted visualizations are already seeming passé due to over and improper use (sparklines are far more useful as are just having a numeric value). Folksonomy is not a tag applied by the content generator is is applied by the content consumer so the consumer can come back to find the information more easily. I like the irony that O'Reilly did not think a book on folksonomy would be needed, but they can not get it right on their own site (or their developer liked the buzz word and nobody knew any better).
What the do have is worth watching.