I like the idea of a tag cloud on Appropedia's front page - you know, a "cloud" of keywords, with the big font representing lots of content and the small font representing small amounts of content, and each keyword is clickable.
Would that be helpful - or are there better ideas?
Appropedia.org: wiki for sustainable design, permaculture, appropriate technology & all that jazz.
Me: Wiki and open knowledge consulting.
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Our PIE page has been updated, anybody wanna test?