story links: katrina devastation video [today], dave winer introduces bbcriver for the blackberry/pda (just like nytimesriver), improv everywhere attacks home depot in slow-motion, ryan patricio makes one-handed speedcubing world record, gooooooooooooooooooooooooooooooooooooooooooooooooooooogle.com art, nyc subway ride challenge, ringtone dancer