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Got a long tweet? Shorten it with TwitterEyes, a Firefox add-on that looks at what you've written and figures out how to make it fit into a smaller space.
Concerned that U.S. space exploration might not be progressing apace, Danny Pier wants to send a smartphone into space to snap pictures and collect location data.
Among other things, CheckoutCheckins shows you a rich history of the places you've been and how often you frequent them--something Foursquare doesn't do well.