Not to sidetrack the discussion (and my brother in law is putting an ipad on his RV-8 panel), I [partially] justified switching to a Droid phone so I could get up to the minute weather before takeoff. On a typical New England afternoon with "scattered thunderstorms", it's nice to know just where they are. Between local wind reports, animated radar, and the local airport's graphical ASOS, it makes the go/no go decision easier... including the decision whether drive out to the field for a quick one after work.