Thanks to new adventures in data loss, a number of employees at Microsoft and Apple weren't exactly kicking back on Columbus Day.

A much-publicized outage this weekend meant that many Sidekick smartphone owners found their contacts, appointments and photos had disappeared into thin air. While Sidekick is sold by T-Mobile, the wireless carrier hasn't been taking as much heat for the incident as Microsoft, considering that a server failure at the Redmond company's Danger subsidiary was to blame.