Furrygoat posts a graphic map of "...10 blogs, with 154 total entries[.] It also shows the size of the entries and details on how recent the posts are." The tool uses Ben Schneiderman's TreeMap idea (which also powers Smart Money's Market Map.) I'm not sure that this is the ideal tool for weblog browsing -- headlines in RSS seem easier to scan -- it does demonstrate one of the big themes emerging now: the tools for visualizing large social spaces are now easy enough to use that they can be implemented by a individuals. Next to corporate work in this domain like Microsoft's NetScan and IBM's historyflow, weare now starting to see personal work like Ben Discoe's Friendster map and now an RSS treemap. More such visualizations to come doubtless, many more, in 2004.