Athens IT contractor finds Wi-Fi too prone to denial of service at present: The Atos Origin manager for the games didn't stress security issues like actual break-ins. Rather, he was concerned about the likelihood of attempted attacks that they would have to analyze, and the potential of a single idiot to jam signals. These are unfortunately reasonable concerns at present--it's all too easy to produce junk 2.4 GHz signals or to automate denial of service attacks that deassociate other clients.