Millions of text messages were sent simultaneously at midnight on New Year's. Many were delayed, or didn't arrive at all. A delay in holiday greetings is not a big deal, but what about during a real emergency? Emergency personnel and government officials are automatically given priority on landline and cellular networks, leaving the average consumer in the lurch. After 9/11, cell-phone traffic in New York was at a standstill for days. Cellular networks, like highways, aren't designed to have everyone use them at once. When everyone tries to make a call at once, for a holiday or emergency, communication breaks down. The communications infrastructure, as it is currently designed, will never be able to handle calling patterns thousands of times heavier than normal. Your best bet? Send an IM. (Photo by PhotoOptik)