As a followup to ongoing discussions about swimming in WDW lakes and in particular River Country, here's a new article about the reason it won't happen:
http://news.aol.com/story/ar/_a/deadly-amoeba-lurks-in-florida-lakes/20070919070609990001
http://news.aol.com/story/ar/_a/deadly-amoeba-lurks-in-florida-lakes/20070919070609990001