Funny -- that patently absurd half a billion figure we heard tossed about earlier this month was low. In reality, Cisco has just announced its full intentions to acquire all of Pure Digital, the maker of the immensely popular Flip Video camcorder, for around $590 million in stock. According to Ned Hooper, senior vice president of Cisco's Corporate Development and Consumer Groups, the "acquisition of Pure Digital is key to Cisco's strategy to expand our momentum in the media-enabled home and to capture the consum