I believe mechanisms like "Bubble my Page" are interesting ... This creates an image (logo if you like) and the same time a visualization of the content of a (single)page.
Here the results from five.tiddlywiki.com : http://www.infocaptor.com/bubble-my-page?url=http%3A%2F%2Ffive.tiddlywiki.com%2F&size=300 -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at http://groups.google.com/group/tiddlywiki. For more options, visit https://groups.google.com/groups/opt_out.