BLDG BLOG is as always full of ideas that might be fun in EP, like buildings with integrated fabbers that allow them to extend themselves.
http://bldgblog.blogspot.com/2010/04/concrete-honey-and-printing-room.html
This post then segues into the issue of gengineering bees to do building repair or extension, linking to a fun little art project about "beamer bees", highly modified biological swarmbots (collagen-nanotube wings!) for pollination and other purposes:
http://powerof8.org.uk/?p=569
"When let out into the world, the beamer bees live in harmony with radiowaves"
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