It's nothing spectacular, really; Mossberg, the chief technology columnist for the Wall Street Journal, was talking about the weak state of broadband services (such as Net-based video) here in the U.S., and at one point, he lets it drop that the "iPhone will be 3G in 60 days"—and that's about it.

Does this mean he publicly make a statement that iPhone will be 3G in 60 days?

What does drop mean here?
let it drop = mention by accident - although of course some of these 'accidents' are deliberate.
Got it!

Thanks, Nona.