We have relatives who won’t trust the cloud, fearing that a company will either go out of business or end a service. After all, if a company as large as Yahoo! can shut down a service like Yahoo! Briefcase (admittedly, a laggard among cloud storage services anyway), what else can happen. This is a perfect example, with URL shortener tr.im announcing Sunday it was shutting down service, effective immediately. URL shorteners are in vogue now, what with the popularity of Twitter and its 140-character limit. Much